CORROSION PROTECTION
Contents
1. Anodic plate location b Anodic plate c Threaded boss up Bravo One Sterndrive Units 1 Remove plug from drive shaft housing to gain access to attaching screw 22093 a Rubber plug or plastic cap 2 Loosen screw and remove anodic plate MSS h Seen oe T U 0 AN k AAAA ee J Nt 76800 a Anodic plate b Screw c Socket and extension Page 7A 9 90 863160 1 JUNE 2003 SERVICE MANUAL NUMBER 28 CORROSION PROTECTION ALL MODELS t To be effective new anodic plate must make good electrical contact with gear housing 3 Install anodic plate screw and continuity washer Torque screw 0 Enni A aE 76800 a Anodic plate b Screw c Socket and extension Description aj Anodic plate screw 4 Reinstall plug in drive shaft housing 22093 a Rubber plug or plastic cap 90 863160 1 JUNE 2003 Page 7A 10 SERVICE MANUAL NUMBER 28 CORROSION PROTECTION ALL MODELS Bravo Two Sterndrive Units 1 Loosen screw and remove anodic plate 2 Install anodic plate screw and continuity washer Torque screw 50323 a Screw b Anodic plate o Anodic plate screw Bravo Three Sterndrive Units 1 Remove plastic cap to gain access to the anode attaching screw i 76832 a Plastic cap removed b Screw 2 Install new anode and continuity washer Torque screw Description Nm bin Anodic plate2. and or sacrificial anodes to polarize the surrounding water Be careful not to rock the boat excessively while boarding to perform a test as this will alter the test reading 1 Set meter on scale required to read 0 2000 millivolts 2 Connect the negative meter lead to the negative battery terminal or other convenient engine ground 3 Connect Reference Electrode Tester lead into positive receptacle of meter 4 Immerse Electrode Tester in the water within 15 cm 6 in of aft end of sterndrive unit IMPORTANT There will be different voltage readings depending on the type of MerCathode System you are testing 5 The following readings indicate the corrosion protection status of the sterndrive unit Refer to Section 1C Troubleshooting Digital Multi Meter Corrosion Protection Between 750 1050 eek Sterndrive is protected millivolts Below 750 millivolts Sterndrive is corroding Above 1050 millivolts Sterndrive is overprotected Digital Multi Meter Corrosion Protection Between 850 1100 ae Salt Polluted or Mineral a Sterndrive is protected J J millivolts Laden Water Below 850 millivolts Sterndrive is corroding Above 1100 millivolts Sterndrive is overprotected 90 863160 1 JUNE 2003 Page 7A 21 CORROSION PROTECTION ALL MODELS SERVICE MANUAL NUMBER 28 Continuity Test 1 Connect the end of the positive meter lead to each metallic component on the sterndrive Ensure that there is good electrical contact t
3. ANUAL NUMBER 28 DMT 2000A Tachometer Multi Meter Kit R u mA TEMP COM v Measures rpm on both 2 and 4 cycle marine engines records the maximums and minimums simultaneously and will read accurately in high RFI environments Replacement components 91 854010 1 Inductive Pick Up 8 ft 2 4 m 91 854011 1 Temperature Probe 91 854012 Ferrite Core 91 854013 1 Interface Module 91 854014 1 Hard Carrying Case 91 854015 1 User s Guide 91 802651 Test Leads Optional Accessories 84 854016T 8 ft 2 4 m Inductive Pick Up Extension 91 802650 1 Clamp On Current Probe 91 89045 1 Direct Voltage Adapter 91 854009A3 IMPORTANT If equipped with MerCathode System ensure that battery is fully charged 12 6 volts or above Page 7A 20 90 863160 1 JUNE 2003 SERVICE MANUAL NUMBER 28 CORROSION PROTECTION ALL MODELS IMPORTANT Boats recently placed in service usually will produce a reading higher than normal because the sterndrive unit is protected by a good finish and new sacrificial anodes To obtain an accurate diagnosis the test should be performed after the boat has been in service at least one or two weeks This will give the paint a chance to soak and minor abrasions and scratches will have appeared resulting in a more accurate reading IMPORTANT Boats should be moored without being operated for at least 8 hours before performing tests This is necessary to allow the MerCathode System
4. ELS Connect to MerCathode Controller Assembly NOTE If BLACK ground wire is not available at terminal block or from wire harness install a separate lead between controller negative terminal and negative battery cable attaching point on engine 1 Securely connect electrical leads to MerCathode controller assembly See Wiring Diagrams 2 Apply a thin coat of sealant to all electrical connections Liquid Neoprene All electrical connections 92 25711 3 Wiring Diagrams MerCathode Controller Standard Models BLK Black BLU Blue BRN Brown GRY Gray GRN Green ORN Orange PNK Pink PUR Purple RED Red TAN Tan WHT White YEL Yellow LIT Light DRK Dark 73596 a MerCathode controller b 20 Amp fuse c MerCathode assembly 90 863160 1 JUNE 2003 Page 7A 17 CORROSION PROTECTION ALL MODELS SERVICE MANUAL NUMBER 28 MerCathode Controller Quick Connect Models 79133 a MerCathode controller b 20 Amp fuse c MerCathode assembly d Female terminal e Male terminal Galvanic Isolator Page 7A 18 Boats that are connected to AC shore power require additional protection to prevent destructive low voltage galvanic currents from passing through the shore power ground wire A Quicksilver Isolator 888557Q01 can be installed to block the passage of these currents while still providing a path to ground for dangerous fault shock currents t If AC shore power is not isol
5. ICE MANUAL NUMBER 28 CORROSION PROTECTION ALL MODELS Low Readings continued Cause Special Instructions Disconnect the reference electrode lead brown from the controller R terminal Connect the lead to the positive terminal of a digital multimeter set on 0 2000 millivolt scale Connect the negative meter lead to the negative battery terminal Note the meter reading then repeat the test using a MerCathode Reference Electrode Tester 7667511 You should obtain the same reading in both cases If not replace the reference electrode With anode and reference electrode leads connected to the controller connect the jumper wire between R and negative terminals on the controller Connect the positive lead of the volt meter set on 0 20 scale to terminal A on the controller Connect the negative meter lead to the negative controller terminal Reading should be as follows e Freshwater Areas 750 1050 millivolts Saltwater Areas 850 1050 millivolts If the reading is low replace the controller Faulty MerCathode reference electrode Faulty MerCathode Controller Additional corrosion protection required Boats equipped with a sizable amount of Install additional anodes or MerCathode underwater metal stainless steel prop System 88334A2 If the unit is already after planes etc or that are moored in equipped with a MerCathode System a an area with warm o
6. Liquid Neoprene All electrical connections 92 25711 3 Page 7A 4 90 863160 1 JUNE 2003 SERVICE MANUAL NUMBER 28 CORROSION PROTECTION ALL MODELS e Inspect the sacrificial trim tab at regular intervals and replace it before it is half gone If a stainless steel prop is installed additional anodes or a MerCathode System will be required e Inspect the prop shaft for fishing line which can cause corrosion on stainless steel shaft e Remove propeller at least every 60 days and lubricate the propeller shaft e Do not use lubricants containing graphite on or near aluminum in salt water e Do not paint trim tabs or the mounting surface Continuity Circuit The transom assembly and sterndrive unit are equipped with ground circuit wires to ensure good electrical continuity between engine transom assembly and sterndrive components Good continuity is essential for the anode and MerCathode System to function most effectively 1 Inspect the following ground circuit components at intervals for loose connections or broken or fraying wires ee ee W ROE lt PANJ ee o SESI 22028 77079 a Inner transom plate to gimbal housing ground wire b Drive shaft housing to gear housing ground plate inside anode cavity 90 863160 1 JUNE 2003 Page 7A 5 CORROSION PROTECTION ALL MODELS SERVICE MANUAL NUMBER 28 r a TEETE Bales me i eats ePgehahatebre 76 VESTES 8004 gt 1 SSSI TERENI POOR IO HOC OEM
7. SERVICE MANUAL NUMBER 28 CORROSION PROTECTION ALL MODELS CORROSION PROTECTION Section 7A All Models Torque Specifications 7A 2 Lubricants Sealants Adhesives 7A 2 Special Tools 0 ccs eee eee 7A 2 General Information 0e000 7A 4 Continuity Circuit TA 5 Trim Cylinder Anodes 55 7A 8 Anodic Plate 02000ceeeeueees 7A 9 Bravo One Sterndrive Units 7A 9 Bravo Two Sterndrive Units 7A 11 Bravo Three Sterndrive Units TA 11 Integral MerCathode System 7A 12 Removing Gimbal Mounted MerCathode Assembly 7A 13 Installing Gimbal Mounted MerCathode System 7A 14 Connect to MerCathode Controller Assembly 7A 17 Wiring Diagrams 00eeeeee TA 17 MerCathode Controller Standard Models 7A 17 MerCathode Controller Quick Connect Models 7TA 18 Galvanic Isolator 5e005 7A 18 90 863160 1 JUNE 2003 Corrosion Protection Testing and Troubleshooting 000ce eee eeee 7TA 19 Continuity Test 006 7A 22 Test Equipment Set Up 7A 23 Low Readings 0e eee eae 7A 24 High Reading 00c eevee 7A 26 Normal Reading But Corrosion is Evident 0 0 00 7A 26 Corrosion On The Entire Sterndrive Unit 7A 26 Corrosion Problem Developed After Refinishi
8. Zi _ F H i D a b _ BR KOO He OE 77100 a Gimbal housing to gimbal ring ground wire b Gimbal housing to trim cylinder ground wires 22028 50242 Gasoline models Diesel models a Flywheel housing grounding stud b Ground wire c Inner transom plate grounding screw Page 7A 6 90 863160 1 JUNE 2003 SERVICE MANUAL NUMBER 28 CORROSION PROTECTION ALL MODELS Ad 4 4 mM 74 We ai KX 22755 a Gimbal ring to bell housing ground wire b Sterndrive unit to bell housing ground plate 22031 70575 a Drive shaft housing anodic plate b Continuity washers between fasteners and hydraulic manifold block to gimbal housing 22079 50383 a U joint bellows ground clip b Exhaust bellows ground clips 90 863160 1 JUNE 2003 Page 7A 7 CORROSION PROTECTION ALL MODELS SERVICE MANUAL NUMBER 28 Trim Cylinder Anodes t Do not paint new trim cylinder anodes as this will render them ineffective as a galvanic corrosion inhibitor 1 Remove screws that secure anodes to trim cylinders 2 Remove anodes 71966 a Screws b Trim cylinder anodes 3 Clean thread holes with a 10 32 standard tap 4 Install new anodes and tighten securely Page 7A 8 90 863160 1 JUNE 2003 CORROSION PROTECTION ALL MODELS SERVICE MANUAL NUMBER 28 Anodic Plate Do not paint new anodic plate as this will render it ineffective as a galvanic corrosion inhibitor a
9. ated from boat ground the MerCathode System and sacrificial anodes may be unable to handle the increased galvanic corrosion potential 90 863160 1 JUNE 2003 SERVICE MANUAL NUMBER 28 CORROSION PROTECTION ALL MODELS Corrosion Protection Testing and Troubleshooting NOTE The following corrosion protection test supersedes all previously issued tests This test can be used on applications with or without a MerCathode System If the unit is equipped with a MerCathode System this test should be performed annually where the boat is moored to ensure that the system is functioning properly Test requires the use of MerCathode Reference Electrode and a digital multi meter A STANDARD ANALOG METER CANNOT BE USED AS AN INACCURATE READING WILL RESULT The MerCathode Reference Electrode Tester is equipped with a special connector containing a resistor to provide the proper scale reading when used with a digital multimeter Do not remove this plug or use analog meters Resistor jack can be left in place when using digital meters 76834 Digital Multimeter and MerCathode Reference Tester a DMT 2000A Tachometer Multi Meter b Reference Electrode Reference Electrode Senses an electrical current in the water when testing the MerCathode System Use to check hull potential 91 7667511 90 863160 1 JUNE 2003 Page 7A 19 CORROSION PROTECTION ALL MODELS SERVICE M
10. ately 0 8 mm 0 032 in diameter wire b 12 3 cm 5 in c 45 degree angle d 13 mm 1 2 in 3 Insert 45 degree angle end of wire through center hole in hydraulic connector block 4 Guide wire through hole until wire protrudes through cavity at the bottom of exhaust pipe EAA A LET A o AANE D Lg XQ a Wire 22235 5 Secure ring terminals to guide wire 6 Guide leads through center hole in connector block IMPORTANT ORANGE lead is approximately 15 cm 6 in longer than the BROWN lead 90 863160 1 JUNE 2003 Page 7A 15 CORROSION PROTECTION ALL MODELS SERVICE MANUAL NUMBER 28 7 Pull leads into the boat acim See i prj 7 Seem A Na aes eS aad th raz 22234 a Guide wire b Leads Do not paint sacrificial anodes or MerCathode System anode reference electrode assembly as this will render them ineffective as galvanic corrosion inhibitors 8 Position and secure MerCathode assembly to gimbal housing using two 35 mm 1 3 8 in long screws flat washers and lockwashers 9 Torque screws Do not overtighten 70771 a MerCathode assembly b Screw 2 c Flat washer 2 d Lockwasher 2 e Hydraulic connector block Description Description CCN jiin bt MerCathode assembly mounting screws Page 7A 16 90 863160 1 JUNE 2003 SERVICE MANUAL NUMBER 28 CORROSION PROTECTION ALL MOD
11. dule 91 854014 1 Hard Carrying A AMA TEMP COM vV Mz Case Q 91 854015 1 User s Guide _ A 91 802651 Test Leads Optional Accessories 84 854016T 8 ft 2 4 m Inductive Pick Up Extension 91 802650 1 Clamp On Current Probe 91 89045 1 Direct Voltage Adapter 1 If you do not already have this meter use a digital multi meter Do not use a standard analog meter as inaccurate readings will result NOTE Quicksilver Volt Ohm Multi Meter DVA Tester 91 99750A1 is no longer recommended for testing corrosion protection 90 863160 1 JUNE 2003 Page 7A 3 CORROSION PROTECTION ALL MODELS SERVICE MANUAL NUMBER 28 General Information 78283 Standard Bravo sterndrive unit a Sacrificial trim cylinder anode b Sacrificial anode anodic plate c Steering lever ground wire d Ground wire between gimbal ring and bell housing e Stainless steel hoses f Ground wire between gimbal ring and gimbal housing The following maintenance items are recommended to ensure that your sterndrive unit stays corrosion free e Maintain a complete paint covering on the sterndrive unit e Check the finish regularly and prime and paint nicks and scratches using Mercury enamel paint and touch up paint Use only tin based anti fouling paint on or near aluminum surfaces below the waterline e If bare metal is showing apply 2 coats of paint Mercury Phantom Black 92 802878 1 e Spray all electrical connections with sealant
12. e propeller shaft before reinstalling the propeller Continuity lost between propeller and propeller shaft Special Lubricant 101 92 802865A1 2 4 C with Teflon p r D 92 802859A1 Anti Corrosion Grease seen ne 92 802867A1 Perfect Seal 92 34227 1 PAINT BLISTERING THE METAL UNDER THE BLISTERED PAINT IS NOT PITTED Cause Special Instructions Sand the surface down to bare metal prime and repaint with Quicksilver Spray Paint The surface was not properly prepared before paint was applied Page 7A 28 90 863160 1 JUNE 2003
13. l Instructions Salt crystals remaining on the surface of the sterndrive components combine with Wash sterndrive exterior and flush high humidity to cause electrolyte sterndrive interior with fresh water formation resulting in corrosion CORROSION BETWEEN SURFACES Salt buildup between surfaces Protect mating parts with lubricant 2 4 C with Teflon Propeller shaft 9234227 ALUMINUM CORRODING IN LUBRICATED AREAS Cause Special Instructions Never use lubricants containing graphite Graphite in the lubricant because they accelerate corrosion Use specially formulated marine lubricants 2 4 C with Teflon Propeller shaft 92 342237 1 90 863160 1 JUNE 2003 Page 7A 27 CORROSION PROTECTION ALL MODELS SERVICE MANUAL NUMBER 28 Normal Reading But Corrosion is Evident continued STAINLESS STEEL COMPONENTS CORRODING Cause Special Instructions Foreign matter fishing line marine growth etc covering the steel and starving it of oxygen This causes a Remove foreign matter and prevent surfaces from being covered by sand or silt breakdown of the protective oxide film and subsequent corrosion known as oxygen starvation corrosion Burying stainless steel in sand or silt can also cause this problem STAINLESS STEEL PROPELLER CORRODING Cause Special Instructions Clean the mating surfaces on the propeller propeller shaft and attaching parts If applicable install a continuity washer Lubricate th
14. ng The Sterndrive Unit 7A 26 Paint Blistering On Sterndrive Unit 7A 26 Trim Cylinder Corroding 7A 27 Only One Or Two Components Corroding 7A 27 Corrosion In The Exhaust Outlet Area 00 00a e 7A 27 Corrosion Occurs After The Unit Is Removed From The Water 7A 27 Corrosion Between Surfaces 7A 27 Aluminum Corroding In Lubricated Areas TA 27 Stainless Steel Components Corroding 7A 28 Stainless Steel Propeller Corroding 7A 28 Paint Blistering The Metal Under The Blistered Paint Is Not Pitted 7TA 28 Page 7A 1 CORROSION PROTECTION ALL MODELS SERVICE MANUAL NUMBER 28 Torque Specifications NOTE Securely tighten all fasteners not listed below Ten Te mosce TOO Where Used Propeller shaft Senses an electrical current in the water when testing the MerCathode System Use to aa Gero check hull potential Page 7A 2 90 863160 1 JUNE 2003 SERVICE MANUAL NUMBER 28 CORROSION PROTECTION ALL MODELS DMT 2000A Tachometer Multi Meter Kit Measures rpm on both 2 and 4 cycle marine engines records the maximums and minimums simultaneously and will read accurately in high RFI environments Replacement components 91 854010 1 Inductive Pick Up 8 ft 2 4 m 91 854011 1 Temperature Probe 91 854012 Ferrite Core 91 854013 1 Interface 91 854009A3 Mo
15. o each metal surface Reading should drop below 2 millivolts A reading higher than 2 millivolts indicates improper grounding If the reading is not within specified limits or if reading is within specifications but there is evidence of corrosion on sterndrive unit refer to the following troubleshooting charts to aid in diagnosis 76868 Gimbal mounted MerCathode on bottom of transom assembly a Anode b Reference electrode 71895 Transom mounted MerCathode on boat transom a Anode b Reference electrode Page 7A 22 90 863160 1 JUNE 2003 SERVICE MANUAL NUMBER 28 CORROSION PROTECTION ALL MODELS Test Equipment Set Up 70755 a 15 cm 6 in maximum b Power package ground c Battery d Waterline 90 863160 1 JUNE 2003 Page 7A 23 CORROSION PROTECTION ALL MODELS SERVICE MANUAL NUMBER 28 Low Readings Cause Special Instructions Loss of continuity between sterndrive unit Ensure that continuity devices are not components and negative battery missing or damaged and that connections terminal are clean and tight Shore power green safety grounding lead Disconnect shore power and verify if not isolated from the power package reading increases If so installa ground on boats equipped with shore Quicksilver Isolator 888557Q01 or an power isolation transformer Underwater metal parts on the sterndrive unit and or boat are unpainted or the paint Prime and paint underwater metal parts is in p
16. oor condition The boat has more This will reduce the load on the anodes exposed metal than the anodes and or and or MerCathode System MerCathode System can protect Anodes painted Remove paint or replace anodes The anodes are improperly grounded or Clean anode mounting surface or replace inactive anodes if they have oxidized Anodes consumed no longer protect Replace anodes if eroded 50 or more Avoid any electrical interconnection between the Mercury MerCruiser product anodic blocks or MerCathode System and the paint by allowing a minimum of 40 mm 1 1 2 in of UNPAINTED area around these items on the transom of the boat MerCathode reference electrode or anode Remove nam painted pone Anodic heads used instead of plastic caps Reinstall the plastic caps Connect the positive volt meter lead set on 0 20 volt scale to the positive controller terminal and the negative volt meter lead to the negative No power to MerCathode controller terminal The meter should indicate battery voltage Check for a blown fuse if equipped on the starboard MerCathode System Clean the connection or repair wiring as required Sterndrive unit and or boat bottom painted with anti fouling paint containing copper or tin Poor connection between reference Gieanand ortaniea ihe connecion electrode lead BROWN or anode lead Pear ie ses ORANGE and MerCathode controller p g Page 7A 24 90 863160 1 JUNE 2003 SERV
17. r rapid flowing water second system may be required may require additional protection 90 863160 1 JUNE 2003 Page 7A 25 CORROSION PROTECTION ALL MODELS SERVICE MANUAL NUMBER 28 High Reading Cause Special Instructions Stray current corrosion If an electrical current flowing along a metal conductor leaves the metal for a water path it will cause ionization of the metal and an area of rapid corrosion Poor connection between MerCathode Clean and or tighten connection Repair reference electrode lead BROWN and Winna fe a d see R terminal on controller g q Observe the reading while disconnecting the electrical components one at a time until you eliminate the high reading Correct the course of stray current Disconnect the reference electrode lead BROWN from R terminal on the controller Connect the lead to the positive terminal of a digital multi meter set on 0 2000 millivolt scale Connect the negative meter lead to the negative battery terminal Note the meter reading then repeat the test using MerCathode Reference Electrode Tester 76675711 Both tools should produce the same reading If not replace the reference electrode Faulty MerCathode controller Replace the controller Normal Reading But Corrosion is Evident CORROSION ON THE ENTIRE STERNDRIVE UNIT Cause Special Instructions Leave the sterndrive unit in the IN DOWN position when the boat is moored to ensure the t
18. rim tab is in the water providing protection CORROSION PROBLEM DEVELOPED AFTER REFINISHING THE STERNDRIVE UNIT Faulty MerCathode reference electrode The sterndrive unit is raised so that the sacrificial anodic trim tab is out of the water Pp Cause Special Instructions Instructions E steel wire brush was used to clean the aluminum casting Steel particles became Use only a nylon or bristle brush entrapped and set up a small galvanic cell PAINT BLISTERING ON STERNDRIVE UNIT Cause Special Instructions Instructions ee charger using 110 volt shore Ensure the charger is connected correctly power improperly connected to the battery Page 7A 26 90 863160 1 JUNE 2003 SERVICE MANUAL NUMBER 28 CORROSION PROTECTION ALL MODELS Normal Reading But Corrosion is Evident continued TRIM CYLINDER CORRODING Cause Special Instructions Continuity lost between trim cylinder and Install proper continuity devices sterndrive unit ONLY ONE OR TWO COMPONENTS CORRODING Cause Special Instructions Continuity lost between sterndrive unit and If not already done install Continuity components Circuit Kit 99940A2 CORROSION IN THE EXHAUST OUTLET AREA Cause Special Instructions Exhaust gas deposits accumulating on the sterndrive exterior can result in paint ili ode edi with marine or blistering and corrosion l CORROSION OCCURS AFTER THE UNIT IS REMOVED FROM THE WATER Cause Specia
19. screw 3 Reinstall plastic cap 90 863160 1 JUNE 2003 Page 7A 11 CORROSION PROTECTION ALL MODELS SERVICE MANUAL NUMBER 28 Integral MerCathode System The MerCathode System automatically protects the drive unit from corrosion The increased output provides greater protection for underwater aluminum parts Its reliable efficient operation requires an insignificant amount of current when protection is needed The blue MerCathode controller output is limited to approximately 200 mA to avoid rapid drain of the boat s battery HMERCATHODE 79094 Single MerCathode application In saltwater a second MerCathode System blue controller may be added in parallel to increase protection to 400 mA Please note that this will also increase the drain on your battery Refer to the Mercury Precision Parts Marine Corrosion Protection Guide 90 881813003 MERC ATHODE MERC ATHOUE 79095 Dual MerCathode application a ORANGE lead from anode on transom assembly b RED PURPLE lead connect to positive battery terminal c BLACK lead from engine harness d BROWN lead from reference electrode on transom assembly Page 7A 12 90 863160 1 JUNE 2003 SERVICE MANUAL NUMBER 28 CORROSION PROTECTION ALL MODELS Removing Gimbal Mounted MerCathode Assembly The Hull Potential Test should be performed to ensure that the system is functioning properly Refer to Corrosion Protection Testing and Troubleshooting following in
20. this section 1 Disconnect MerCathode assembly wires from MerCathode controller or disconnect the quick connect terminals 74251 Standard controller shown a Lead to anode of MerCathode assembly ORANGE b Lead to reference electrode of MerCathode assembly BROWN 2 Remove the two mounting screws and washers holding the MerCathode assembly to the gimbal housing 1 OO ar a AT S rf oT IWAN VILLLLL LL LLL Lhd yess aa aa a I b gt 70771 a MerCathode assembly b Screw 2 c Flat washer 2 d Lockwasher 2 90 863160 1 JUNE 2003 Page 7A 13 CORROSION PROTECTION ALL MODELS SERVICE MANUAL NUMBER 28 3 Gently remove the MerCathode assembly and wires from the gimbal housing FILLLL LLL Lh LALALALA Gl NI e 70771 a MerCathode assembly wires b MerCathode assembly Installing Gimbal Mounted MerCathode System Rubber seal must be properly seated in groove of electrode assembly or water leakage into boat will result 1 The gimbal mounted MerCathode assembly has a factory installed rubber seal and does not require an O ring 71862 a MerCathode assembly b Anode c Reference electrode d Rubber seal Page 7A 14 90 863160 1 JUNE 2003 SERVICE MANUAL NUMBER 28 CORROSION PROTECTION ALL MODELS 2 Forma 61 cm 2 ft long piece of 0 8 mm 0 032 in diameter wire to the dimensions shown 74106 a 61 cm 2 ft of approxim
Download Pdf Manuals
Related Search