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    Spark plug type

    It depends which ignition system it has. The 55 Hp from late 60.es and early 70.es had three different systems. 1. Magneto Champion L4J or equal 2. Battery Champion L4J or equal 3. Magnapower Champion UL18V 555HA should have magneto ignition but someone could have change it.
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    Force 85 1989 flywheel magnet pain

    If you have six individual magnet your engine has the Mercury Thunderbolt ignition. The Prestolite system has a magnet strip. You can find the spec for the stator at outboardignitiondotcom.
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    87 85 hp force

    Clean the carbs and set the floats at right level. It should be parallell with the carb body casting edge when turned upside down. Set the air/fuel mixture screw at 1 1/8 out from lightly seated. Then you maybe have to fine tune the mixture screw when warmed up. At last set the idle screw to...
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    Force by Mercury 120 will not idle

    Read the rules for this site and start your own thread. This one is 7 years old and Frank A is not with us any more.
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    1991 Force 90hp starting problem

    Seams like that is a franken engine! Hard to see in the pics but the model is 908F90C or 906F90C? The XXXF90C says it is a 1990 year model BUT the power head look like a later 1994 or later cause it has the Mercury style fuel pump. Your fuel pump is the right one for that power head, but the...
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    70s Chrysler 16hp outboard funny runner

    Try Franz Marine service
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    88 mariner force 50 hp leaking fuel out exhaust and drain hole

    Check the fuel pump diaphragm, I think you have a hole in it and the cylinder driving the pump will get fuel right through the crank case and push it out the exhaust down the leg.
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    Help identifying an outboard motor

    Mercury Thunderbolt ignition, might be 1992 or newer. If it has Mercury style LU it is 1995 or newer.
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    88-89 Force 15 HP coil info please?

    Mastertech marine and others have coil that should fit. Part number is 185-2370. The wire colours do not matter, the important thing is that it fit and the resistance of the secondary winding is in about right range.
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    1991 Force 90hp starting problem

    Look at the sticker in the top of this forum by FrankA to set the timing and throttle pick up point. There is also a You tube video by FrankA how to do it. I think your setting of the idle and the throttle pick up point is out of adjustment.
  11. N

    WATER PUMP LINER

    No problem with out of balance, you can rebore up to 040 with no problem. If you do as much as 040 oversize you maybe have to rejet the carb feeding the rebore cylinder. The Chrysler block that has 3,312 in bore can be rebore up to 040 oversize and I think your 115Hp has the same size of the...
  12. N

    1989 Force 85 HP Starter Disengages

    If the starter continued to turn after the bendix disengage the flywheel there is an issue with the starter solenoid. The starter gets power from the solenoid.
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    WATER PUMP LINER

    Take the block to a workshop that can machine it. Measure the bore and rebore it, I think you are able to rebore to 040 oversize. No need to put a new sleeve in if you can rebore.
  14. N

    1991 Force 90hp starting problem

    Which ignition system does it have Prestolite or Mercury Thunderbolt? You are saying "Idle speed is set as the mark is right below the touch point"???? Idle speed screw is at the tower shaft and you adjust it by screw it in or out and it rests at the engine block. I think you mean the throttle...
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    Force 125 to 150 swap questions

    The 1989 125Hp should have Prestolite CD ignition system. Four blue or black ignition coils and two blue or black CD boxes. What ignition system has the 150Hp? Does it have the Prestolite system or the Mercury Thunderbolt system. If they have different system to each other, the wiring is different.
  16. N

    1971 chrysler 12.9

    9,9Hp, 10Hp and 15Hp from early 70.es with magneto ignition maybe fit.
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    Force 120 won’t shift into reverse, will on muffs.

    The older Mercs that I have worked with and had the same or similar shifting the shift shaft coupling at the split has a spline and it is has a notch so the shaft only goes one way in to fit. Some says you should put the gear in forward before pulling the LU off some says put it in neutral. I...
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    Force 120 won’t shift into reverse, will on muffs.

    Okey, that is a 1995 with Mercury style LU. The different between the Chrysler and the Mercury style shifting is that the Chrysler style shifting by pushing/pulling the shift rod up and down. The Mercury style is shifting by turning the shift rod back and forth.
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    120 hp 1995

    If it is a 1995 120Hp the std. piston is 3,375 in.
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    1987 125 force issues

    As jimmbo says, check for good spark and compression then cleaning the carbs. Check the fuel pump diaphragm, set the float level and adjust the air/fuel mixture screw.
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