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    85hp 3 cylinder Force carburetor throttle plates.

    DunbarLtd: I think jerry mean that the throttle butterflies need to equal at idle. A little difference at WOT do not have any affect for the performance. As I mention before the last degrees at WOT to horizontal have very little affect. Gica: Yes the three carb engines has a tie bar same as the...
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    85hp 3 cylinder Force carburetor throttle plates.

    If the throttle butterflies are not equal horisontal at WOT, sync them at WOT. Set remote control at WOT and loose the screw at throttle rod that connect the butterflies at not horisontal carb and sync it. Check how the butterflies are at idle, they should be equal to each other. You adjust the...
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    1979 75hp Chrysler

    What ignition system do you have? OEM Prestolite CD system. Belt driven distributor Magna Power I system or converted to regular battery auto system with distributor? Magna Power I .... Champion L20V Prestolite..... Champion UL18V Regular auto system with points distributor.....Champion L82C...
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    Chrysler 75hp, need direction.

    Look at the throttle cam curve and you see how it is shaped. As topgun says, that is pretty much how it is.
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    Not sure if something broke

    Yes, some of the impeller housing has that white plastic tube some does not have it. They have a rubber grommet. If I remember right larger Chrysler has the white plastic tube and Force has a grommet. What engine are you dealing with? I see it has the two piece drive shaft so it must be a Force...
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    Force 120hp won't start

    Starter disengaging when engine takes over is normal and it should do that. Your issue is that the engine do not start and run, just want to but do not. Something is wrong with the timing/throttle tune, but I can not right know figure it out. If you have done the link and sync by Frank A it...
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    1990 Force 120HP carbs mix adjustment help

    As you says you can not change HT wires. I am in Sweden Europe but here you can buy spark plug boots that you screw in to the wire. Cut the end of the wire and change boot or clean the OEM boot spring and pierce it in to the wire.
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    1987 Force 125 tower shaft linkage frozen/seized

    Check out your throttle pick up point adjustment and throttle rod adjustment. You should have a little play to advance the throttle when starting. In the pic it is to tight.
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    Johnson 4HP questions

    Do as Jimmbo says check compression and check for spark. The spark should jump at least 1/4 in in atmosphere. The ignition coils for these old OMC engines had a tendency to crack over time and dry out. They can create spark but when under load it will fail. Pull the flywheel and check those coils.
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    Short vs Long Shaft for 4hp

    OMC smal OB 60-70.es has an extension part for the long shaft. Easy to see, different between short and long shaft is 5 in. Short shaft 15 in long shaft 20 in. You measure from transom clamp to anti cavitation plate.
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    Milky fuel in carb intake force 85hp

    Main jet for sea level-2500 FT should be 0,074. 2500-5000 FT should be 0,072. It will not run well with a too small main jet. I do not know if this have anything to do with your issue, but it will run lean with a 0,072 at lower sea level. Think your main issue is water intrusion in 3 and 4 cylinder.
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    Force 120hp won't start

    Rebuild the one you have. An auto electric workshop that rebuild starters for cars will fix it. New brushes, clean up the commutator and maybe new bushings then it will be okey. If you buy a new one be ware of the cheap Chines starters. They are crap. Buy a Prestolite or a Bosch starter, maybe a...
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    Milky fuel in carb intake force 85hp

    If the diaphragm is brittle and slightly cracked fuel will leak through and it will not pump sufficiently.
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    1990 Force 120HP carbs mix adjustment help

    You do not need to buy a new separation cover plate. It will be deformed too as the heat from the exhaust will make it to warp. use the one you have. Check if there is some leakage at the covers or damage. You need new gaskets and yes pull the head too and check the head gasket. BTW Another...
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    1990 Force 120HP carbs mix adjustment help

    Clean plugs maybe is a sign of water intrusion. Check the head gasket, looks like it is okey from the compression numbers but there are also a chance it will have water intrusion from the exhaust side. Leakage at the gaskets at the exhaust cover can also cause water intrusion to the cylinders.
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    Force 120hp won't start

    Yes the mixture will be different but not from the 2 stroke oil sinking. The gasolin will evaporate and the mixtur will be different from that. I would suggest you to clean out that fixed tank. I think there is a lot of dirt and condensation water from all years in the bottom of it. BTW Make...
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    1998 Force 120 Impeller Kit

    As racerone and jerryjerry says. Only change the impeller. If you are careful when disassemble the housing you can reuse the gaskets and maybe put some liquide gasket such as Permatex Form a gasket No. 3 to the gaskets.
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    Force 120hp won't start

    In my opinion an electric fuel pump is a NO NO NO. The OEM pressure driven pump is very very reliable. The check valves never fail, change diaphragm and maybe the gaskets and it should work.
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    Force 120hp won't start

    I have not worked with the L-drive but the 3 and 4-cylinder Chrysler/Force need a 60 Ah or lager battery 550 CC or more (cranking capacity). Are you sure the LU (L-drive) is okey? The only thing except the gears and bearings that maybe slow the cranking speed is the impeller. A new impeller in...
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    1990 Force 120HP carbs mix adjustment help

    I think the recommended RPM at WOT for best performance is 4800-5200 RPM. Try to go down 2 in in pitch, 1 in down will rise the RPM about 200. A 17 in prop would end up with about 4800 RPM at WOT. If it sometimes will die when put in gear at 800 RPM in gear, try to rich the air/fuel mixture at...
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