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    1997 90 hp rebuild project

    I do not think milling the head will increase power, maybe raise the compression. Check that the pistons not touching the spark plugs if you will mill the head. If not milling the head and it is my suggestion, check the head from warping (it used to be a little warped anyway) and grind it flat...
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    Black oil in pick up tube and water pump.

    Okey, then it looks like it is tuned pretty right. Do not set the air/fuel mixture screw less than 1 turn out from seated. As these engines has cross flow scavering system and in some moment the intake ports and exhausts ports are open at the same time, some fresh air/fuel mixture will go right...
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    Black oil in pick up tube and water pump.

    Nothing to worry about, it is unburned fuel. Maybe you carb setting is a little to rich but that is better then to lean. When idling the two stroker do not burn a lot of the fuel. If you have a leakage in the lower crank seal you should have bad idling and maybe you should see water intrusion in...
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    Unsure of year model

    Looking at the decals at the hood it is a 1989-90 year model.
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    Black oil in pick up tube and water pump.

    This is normal, a two stroker do not combust all fuel. The unburned fuel goes out with the exhaust down the leg and out the exhaust nose under the cavitation plate.
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    Milky fuel in carb intake force 85hp

    Yes you can make a compression test without have the power head on the leg. Jump starter direct from the battery or you connect the starter solenoid to the starter and jump the control voltage from the battery to the starter solenoid. I would suggest you to mount the intake manifold on the...
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    Milky fuel in carb intake force 85hp

    The part number for the rings is right for std rings. The last digit 1 after the "A" says it is std. The part number for the std piston must be a Chrysler/Force number. Std piston from Quicksilver should be 834794T3 (whole assembly). When you put the rings in the bore will they go down...
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    Milky fuel in carb intake force 85hp

    Yes, I have done this thing too. Did it at a 70Hp Chrysler and at a 60Hp Chrysler. Removed the connecting rod screws through the intake manifold. Disassembling is no problem except to not drop the needle pins into the crankcase. The needles are loose in the cage, the needle cage is not a...
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    Milky fuel in carb intake force 85hp

    Pull the power head from the engine, split the power head and check the pistons and walls. If the scratches are deep (you can feel them with your nails) then you have to bore and put in new oversize pistons. If not you maybe only need to hone and put in new pistons. If that is the case you have...
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    Milky fuel in carb intake force 85hp

    Check the head gasket first. It is easiest and cheapest. When the head is off you can se how the piston, rings and cylinder walls is at the number 2 cylinder. If bad piston, rings and walls most likely a rebore is needed.
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    Chrysler 75hp, need direction.

    The fuel pump works from over pressure and under pressure (you can call it vaccum/over pressure pulses from the crankcase). The hose is for this function. When you have the pump apart check the check valves in the pump. From my experience they do not go bad, they last almost forever. When...
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    Understanding the numbers on my boat?

    Pull off the hood and check if there is a cam shaft belt from flywheel to the head. There should be a cover over the belt. If no belt for the cam shaft (cover) it is a 2 stroke, if a cam shaft belt (cover) it is a 4 stroke. Look at the power head and you should easily determind if it is a 2...
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    Poppet valve

    Seems to bee different years when the poppet valve disappeared! My youngest son had a 85Hp 1988 and it did not have the valve. I have one 120Hp 1991 and one 125Hp 1989 and none of those have the poppet valve. Have stripped out some blown blocks (3 cylinders 85-90Hp) that have been out of order...
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    Poppet valve

    I think the poppet valve disappeared on the 3 and 4 cylinder Chrysler engineered block in mid 80.es. The engines I have worked with Chryslers up until 1977 and then Force from 1987 and up the Chryslers had poppet valve but not the Forces. Your engine is a late 90.es and do not have the valve...
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    Merry Christmas and Happy New Year

    Same to you all folks. You are the Chrysler/Force forum.
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    1996 Force 120 overheat question

    I would suggest you to check the thermostat and as jerryjerry says most water exit under the water and yes buy a cheap infra red gun to check the temperature with. As you have a late Force there are no idle releaf (poppet) valve on that engine that can be stuck.
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    Left the ignition switch on...

    Merry Christmas to you too.
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    Left the ignition switch on...

    No it will not damage the ignition system. The old regular auto style system with a belt driven distributor with points, condenser and ignition coil can damage the ignition coil if you leave the key ON. If the points are closed current will flow through the primery winding in the coil and maybe...
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    Water in lower unit

    You have to pressurised the LU up to about 10-15 PSI. Google pressure test lower unit outboard and you will find how to do it. Best is to use a special tool for it, some tools only can pressurised some can do both pressure test and vaccum test. If you have a air compressor and a regulator and a...
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    1990 Force 120HP #2 Cyl zero compression and upon opening piston shows damage

    No the broken piece can not be attached in a proper way. It has to be pretty accurate line up for the pivot pin. Otherwise the float and inlet needle will stuck or the needle will not close properly. Maybe JB Weld or other chemical metal can be used to glue it back, but for how long will it last...
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