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    Overheat Alarm past 4000rpm

    I have a 99 Nissan Ns50d2, it has been running great except recently the water alarm will go off if I run past 4000rpms. I have a good stream of water from the tell tale until I go over 4000. As soon as I go past 4000 the water stream weakens and a minute later the alram goes off. I replaced...
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    Nissan 99 NS50D2 Oil Alarm question

    Hello, Last week while running the boat I began to hear a very faint alarm from the control box while in gear. Alarm would turn off in neutral. Got back to the house and noticed while flushing the motor that the oil light was lit. Oil tank almost full, barely used any oil besides running...
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    1999 Nissan 50hp d2- Question

    I recently purchased a used 99 50hp Nissan. Couple questions....I pulled the cover to check the thermostat and there wasnt one?? Im thinking the previous owner removed it. Should I install a new one? The motor seems to run fine now. Also i pulled the lower unit to check the impeller and when...
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    Flywheel bolts size? 1978 35hp seahorse

    Pulling the flywheel on a 1978 35hp. Have the puller not sure what size the 3 bolts i should use are? someone suggested 1/4x20 should these work not sure? thanks alot
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    Motor runs good,then won't start up again

    Hey guys, wondering if anyone might have some suggestions. the motor is a 1978 35hp seahorse, i have gotten it running good but after a short time in the water it turns off and then won't fire again. the motor has good compression, rebuilt the carb, new plugs and coils. Today was the third...
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