DATE: 5/8/80 A. STEERING LINK ROD - 1980 Merc 40
Contents
1. fter filling hydraulic system Remove Fill Vent screw Figure 1 and fill pump reservoir to Full line on dipstick Use SAE 10W 40 SE automotive oil Depress Trailer tilt button on remote control Engine will trim up part way and stop lack of fluid At this time refill pump reservoir to Add line not the Full line on dipstick Continue this procedure until engine tilts all the way up IMPORTANT DO NOT over fill reservoir during this procedure or oil will overflow the reservoir when tilting down Remove Down port plug from hydraulic pump and thread hose fitting adaptor Figure 2 into pump Connect Down port hydraulic hose to hose fitting adaptor and tilt engine down by depressing the In button on the remote control NOTE If thepump sounds like it is running free and the engine does not trim in add more oil to the Pump IMPORTANT The initial air in the system will have caused the oil in the pump to foam giving a false reading Fluid level in the pump should be checked after the system has set for approximately 20 minutes Bleed air from hydraulic trim system by operating trim system 3 or 4 times thru entire trailering range while maintaining fluid in the pump reservoir to the Full line on the dipstick Check fluid level in pump when engine is in full down position see Important immediately preceding Reinstall Fill ent screw Turn screw al2. his allow the engine to develop full power but equally important is the fact that the engine also will be operating inan RPM range that discourages damaging detonation This of course enhances overall reliability and durability of the engine Changes in Boat Condition Scum moss and many other forms of marine growth can develop rapidly on a boat bottom This can be a definite hindrance to boat performance Tachometer Incorrect Many times hours of labor are spent in troubleshooting an outboard only to find that the tachometer is not functioning properly If RPM loss occurs cross reference the tachometer with the shop tachometer Use Quicksilver Engine Cleaner Quicksilver Engine Cleaner C 92 86146 is a blend of chemicals designed to purge power robbing deposits that accumulate in gasoline engines It eliminates costly dismantling of the engine to remove carbon deposits that are caused by certain types of gasolines Heavy carbon deposits in combustion chambers result in spark plug burning pre ignition and reduction of RPM ag we
3. l the way in and back out l 12 turns this vents the reservoir 2 10 Check entire trim system for leaks 11 Reinstall trim adjustment bolt re IMPORTANT Fill Vent screw Figure 3 must be backed out 1 12turns to vent the reservoir moved in Step 2 into transom bracket If necessary refer to the section on Trim Angle Adjustments in D the V 6 Model Outboards En 12330 gine Mounting Instructions a Fill Vent Turn Screw All the Way In and Back Out 1 1 2 C 90 88933 Turns This Vents the Reservoir Figure 3 Both Hoses Connected on Hydraulic Trim Pump D RPM LOSS Occasionally the Mercury Marine Service Department hears customer complaints of top RPM loss This 300 500 RPM loss can occur suddenly and for no apparent reason Listed below are several causes of this problem 1 Temperature and Humidity Summer conditions of high temperature low barometric pressure and high humidity all com bine to reduce the engine power This in turn is reflected in decreased boat speeds as much as 2 or 3 miles per hour in some cases Nothing but the coming of cool dry weather will re gain this speed for the boater Over Propping For boaters to realize optimum engine performance under changing weather conditions it is essential that the engine be propped to allow it to operate at or near the top end of the recom mended maximum RPM range at wide open throttle Not only does t
4. oae gt service bulletin OUTBOARDS ce DATE 5 8 80 CIRCULATE TO SERVICE MANAGER PARTS MANAGER MECHANICS Steering Link Rod 1980 Merc 40 thru I4OEL Remote Control Repair New Style Hydraulic Pump Proper Filling and Vent Procedure RPM Loss STEERING LINK ROD 1980 Merc 40 thru 140EL Attach Service Bulletin Sticker on P 7A 1 in Your C 90 86134 Service Manual Should it become necessary to replace the steering link rod on a 1980 model Merc 40 thru Merc 14OEL Ride Guide Attaching Kit C 79278A1 must be ordered Installation instructions are in cluded in the kit REMOTE CONTROL REPAIR Attach Service Bulletin Sticker on Sec 8B Index Page in Your C 90 74041 Service Manual Some dealers have been repairing worn electric remote controls by ordering Part No A 45955A6 manual control and re installing the electric harness This control A 45955A6 now has been superseded to Part No A 87728A20 which is not compatible with older electric models It is recommended that electric remote controls be repaired with parts available thru service stock or order MerCruiser remote control A 45958AS5 NEW STYLE HYDRAULIC PUMP Proper Filling and Vent Procedure Attach Service Bulletin Sticker on P 6 1 in Your C 90 86133 Service Manual The initial filling and venting of the new style hydraulic pump as used on V 6 outboards is very important to the operation of the trim and tilt system Carefully follow the ins
5. tructions follow ing or those in the engine mounting instructions that accompany the outboard IMPORTANT DO NOT remove Down port plug Figure 1 from pump while filling trim system 1 Check fluid level in pump as follows Place engine in full down position Remove Fill Vent screw Figure 1 and wipe off dipstick with a clean lint free cloth Insert dipstick back into reservoir aes Pull dipstick from reservoir and check fluid level on stick top line on dipstick is Full bottom line is Add a Hose Fitting Adaptor b Down Port Hose Figure 2 Connecting Down Port Hose to Trim Pump a Fill Vent Screw b Dipstick Top Line c Up Port Hose on Dipstick Is Full d Down Port Plug Bottom Line is Add e Manual Tilt Knob Figure 1 Hydraulic Trim Pump Up Hose 12328 Connected Remove and retain trim adjustment bolt from transom bracket This will allow engine to be trimmed to the full in position necessary only when filling hydraulic system Make sure that manual tilt knob Figure 1 is turned full in clockwise finger tight only Remove Up port plug from hydraulic pump and connect Up port hydraulic hose Figure 1 to pump Be careful not to cross thread or over tighten hose fitting Remove shipping cap from end of Down port hydraulic hose NOTE Down port plug inpump is removed a
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