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I have a '99 90hp Yamaha that I am the third owner. When I purchased the motor/boat there was no documentation or any idea of latest or if any tune-up work had been done. This is on a '99 17'3 Baystealth with a Solas aluminum prop 13.5" x 15 pitch. I haven't had any issues what so ever. The boat (with 3 people and gear) will run 32-33 mph and turn about 4800-5000 rpm, maybe 5200 rpm at best.
I want to do a good tune-up, or have it done. What the items that need the most attention? Spark plugs, water pump, impellar, cleaning the carbs...?
The boat doesn't plane out that great but it is manageable. I don't know if I should invest in another prop with more bite or a cavation plate.
Also the tilt/trim is a little weak. When I am making a long run the motor will slow drop down, I will see the boat speed drop and have to trim it back up...then 5-10mins later I have to trim it up again. Could that be low power fluid or a bad seal?
Sorry for all the questions just getting into this hobby. Thanks for any thoughts or suggestions.
I want to do a good tune-up, or have it done. What the items that need the most attention? Spark plugs, water pump, impellar, cleaning the carbs...?
The boat doesn't plane out that great but it is manageable. I don't know if I should invest in another prop with more bite or a cavation plate.
Also the tilt/trim is a little weak. When I am making a long run the motor will slow drop down, I will see the boat speed drop and have to trim it back up...then 5-10mins later I have to trim it up again. Could that be low power fluid or a bad seal?
Sorry for all the questions just getting into this hobby. Thanks for any thoughts or suggestions.
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