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Recent content by Pshelfo

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    1999 Force 75HP 3-Cylinder Air/Fuel Carb Mixture Screw

    Thanks for all the replies. I set the air/mixture to 1 1/2 and the boat appeared to run well when I took it out with no stalling. The pitch came on the boat (aluminum) of which I switched to SS many years back. The boat is a 1998 Nitro 640LX and it always ran around 5K RMP WOT and then...
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    1999 Force 75HP 3-Cylinder Air/Fuel Carb Mixture Screw

    Funny you should ask about WOT. For a few years I have been struggling to find why boat tops out at around 4500rpm at WOT. Used to run 5K which is spec. Compression tests yield right at about 120lb per cylinder. Spark jumps farther than 3/8 on tester. When I have screws set to 1 1/2 it...
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    1999 Force 75HP 3-Cylinder Air/Fuel Carb Mixture Screw

    I have rebuilt my (3) carberators and having trouble with the air/fuel mixture screws. Is there a factory setting and should all 3 carb screws be set the same? They were different prior. Tried setting by ear in water but can’t tell how to do. Setting to 1 and 1/2 seems to run better but...
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