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    HP 60 EFI: Change oil filter without draining oil?

    Absolutely positively.
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    How to read basic timing on 4 stroke?

    What is the serial number?
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    Please help with HPDI issues

    You are not the first to have been fooled.
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    Please help with HPDI issues

    That is not a low pressure pump value. That is the high pressure pump value just expressed in a different unit of measure.
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    1996 mariner 30 hot start issues -- at my wit's end

    The Mercury Marine parts catalog shows two versions. One with an electric enrichment valve and one without. Does your have one or not?
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    1996 mariner 30 hot start issues -- at my wit's end

    What is the engine serial number?
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    F150 Injector stuck open

    How is it known that the gasoline did not instantly vaporize and simply go out the exhaust unburned?
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    F115 - no signal to #2 injector

    By signal I presume that the ground wire is not completing the circuit when it should? And that the injector itself is known to be working? Have you verified continuity on the ground wire from the injector to the ECU?
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    F150 Injector stuck open

    Nothing more to add. Just a failed injector. It happens. 19 years old. God only knows how many times it has opened and closed. Some folks wonder why stuff fails. I sometimes wonder how some stuff lasts as long as it does.
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    F150 Injector stuck open

    Not common but not unheard of either. There are a number of ways that injectors can fail. Failing in an open state is just one of the failure modes. Happens to all injectors of all models and brands. And by the way, a wiring fault can cause an injector to remain open. Injector may be...
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    Please help with HPDI issues

    Why no mention of the medium pressure pump? Low pressure pumps feed the medium pressure pump. Medium pressure pump feeds the high pressure pump. Insufficient fuel pressure from a lesser pump can and will affect the fuel pressure in a greater pump. For instance, if and when the low pressure...
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    She's started "making oil"

    "Making Oil" is a term for fuel getting into the oil system. If it is a recent phenomenon then I suspect that your cylinders might be in need of a decarboning treatment. That or your thermostat(s) are stuck in the open position.
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    2021 yamaha f200 4 stoke

    If the OP is in the USA, then I suspect that he has an F200LB, an F200XB/LF200XB or an F200XB2/LF200XB2.
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    2021 yamaha f200 4 stoke

    How can an answer be given without knowing what F200 we are talking about? Why, oh why, is it so very difficult to type a few more letters?
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    power trim removal of center cylinder

    What is the engine serial number?
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    04 Yamaha LF225 4-stroke- "Oil leak"

    If you believe it to be the top oil seal remove the flywheel to see how far out the seal has moved. It might be possible to tap it back in place. Then fabricate a retainer to hold it there.
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    04 Yamaha LF225 4-stroke- "Oil leak"

    -------
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    Marine Sea Foam

    There are no carburetors on any Yamaha 300 HP two stroke models.
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    2001 200hp HPDI wont run, rebuilt pump, changed all filters, I'm stuck

    Did the pump rebuilder pressure test the pump? If the pump is not outputting rated pressure while it is being supplied with the gasoline it requires, what else could it be? Pressure regulator being part of the pump of course. Who rebuilt the pump?
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    No black/yellow kill wire on 9.9. 4-stroke

    This is from a 2007 Tohatsu owner's manual for a 9.9 four stroke. There has to be wires from either the lanyard kill switch of the push to stop switch at the end of the tiller handle.
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