Be sure to follow the correct installation and break-in procedures in your manual. Improper setup, timing or synchronization can also lead to a premature failure. here
See full version: Remanufactured Powerheads for Mercury and Mariner Outboards
Be sure to follow the correct installation and break-in procedures in your manual. Improper setup, timing or synchronization can also lead to a premature failure. here
Serial number 0G437999 and lower uses part number ME-P3-09-R
Serial numbers 0G438000 through 0G590000 use part number ME-P3-09A-R more
It's extremely important to identify and correct the problem that caused the failure to avoid damaging the replacement powerhead and void the warranty. more
Remanufactured powerheads for Mercury & Mariner outboard motors are covered by a one-year warranty and come with a powerhead installation gasket set. Our prices include shipping in the continental US, including the return of your core for credit. Core value is primarily based on the condition of your block and crank.
Powerheads generally fail for a reason, which can usually be traced back to the cooling system or a lean fuel condition. Whenever a powerhead is rebuilt or replaced, you should also replace the water pump, rebuild the carbs and inspect the entire fuel system. more
Adjust the timing of your ignition at cranking speed. You do this by taking all of your spark plugs out and replacing them with a spark gap tool temporarily. here
Find the TDC (top dead center) indicator and turn the flywheel clockwise until your number 1 piston lines up with it. more
Bring your dial indicator back to zero, then turn your flywheel in a counterclockwise motion until your dial indicator reads .550" before top dead center (BTDC). Now, turn the flywheel back the other way (clockwise) until your dial indicator reads .491" exactly. more
Proper care and maintenance of your outboard motor is essential to its long-term use and functioning. As with any vehicle, there are minor adjustments that must be made occasionally to keep all of the parts working together to provide you a flawless ride. Timing a Mercury 90 Hp outboard motor is just one of the steps you can take extend the life of your boat and to maximize the pleasure you gain from recreational boating.
Detach the throttle cable from its power head. Make sure that you have your timing light connected to your top spark plug lead. more
ELECTRICAL FOR SUZUKI Outboard motor DF40 (DF-40) DF50 (DF-50) more
Pinion Bearing Propeller, Gearcase, Gears, Propeller Shaft Components, Propeller Shaft Bearing Housing, Shift Rod Guide, Housing Components, Water pump and Related Items, Driveshaft Oil Seal Housing, Driveshaft, Trim Tab, Lower Unit Gears-Shimming and Adjustment. [links]
This Service Manual also contains important information on periodic maintenance to help you care for and maintain your engine for a longer life of the engine.
GENERAL INFORMATION FOR SUZUKI Outboard motor DF40 (DF-40) DF50 (DF-50)
If you dont get the advice you need here go to the iBoats forum Mercury & Mariner Outboards Page: 1 - iboats Boating Forums | 36 [links]
and / or the MarineEngine forum Mercury Mariner Outboard Forum more
You may be able to find a manual which covers your engine here Boatinfo - The library, containing manuals, brochures and other technical documents from the last hundred years! Some are genuine Merc/ Mariner manuals but others are Seloc manuals. If you can find a genuine one you are in luck . thats what you really need . Seloc manuals cover too many models.
If you visit either of these forums be sure to fully identify your engine, at least give the year. [links]