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  1. Sea Rider

    8hp starts but runs only at high rpms

    Did the motor overheated badly to have a warped head ? Way to go shaving the cylinder head to sit flat against the new head gasket and crankcase matting surfaces.. If the carb was run dry when the motor was not in use, a meticulous clean out would have suffice... Happy Boating
  2. Sea Rider

    Yamaha 200 static flush with boat in water

    Ask the Yam dealer if the thermo will open up when flushing with motor not being run ? If that ain't happening would preffer muffs flush with motor running and thermo being open. Happy Boating
  3. Sea Rider

    1989 Yamaha 9.9SF 2 cycle stored for 12 years

    If the motor was stored for that long definitely yes, 12 years it's a very long time. Remove spark plugs, sit motor fully horizontal, squirt shots of 25:1 fuel/oil mix ratio on both cylinders and rotate the flywheel back and forth slowly several times till the motor rotates freely. You don't...
  4. Sea Rider

    No spark

    Better get a M40D Service Manual, all the requested info is stated there including how to troubleshoot indivual electrical components. Happy Boating
  5. Sea Rider

    1957 evinrude fastwin 18hp ventilation problems.

    Compression loss is something achieved over time, not the day after unless something is going wrong with the piston's rings ? A compression test will indicate if the motor is still good to go or something else doesn't add up... Happy Boating
  6. Sea Rider

    Carb leaking gas from top two holes 1989 85hp

    If the float's have a cut in which to hook/seat the needle's neck on it doesn't need a clip. Inspect the needle's seat with a flashlight, if gunked, dirty micropolish it in circular motion as in post 23 till shinny for the heavier needle to work flawlessly with the float... Happy Boating
  7. Sea Rider

    Carb leaking gas from top two holes 1989 85hp

    So the rear body has a different shape, connector whatever compared to the old needle, check if can order a new clip for that precise needle type. The new needle could be same diam and lenght but the rear end says it all.... Happy Boating
  8. Sea Rider

    1957 evinrude fastwin 18hp ventilation problems.

    You previously stated that the motor only runs at half throttle at 2500 revs, what happens with the other half throttle ? Isn't possible to throttle any further ? if so, need to address that for carb to open fully and achieve way more rpm at wot to plane the combo much faster. To get the max...
  9. Sea Rider

    Yamaha 200 static flush with boat in water

    Always flush all my motors ON along high water pressure out of the hose whether on muffs or dedicated flushing port, ensures that the thermo is conveniently opened and flush well the internal cylinder head area. Don't know if possible to open the thermo with just high water pressure out of the...
  10. Sea Rider

    Carb leaking gas from top two holes 1989 85hp

    Is it possible to remove the old clip with precaution and install it on the new needle ? If not, will need to order one, if without one carb won't work well... Happy Boating
  11. Sea Rider

    8hp starts but runs only at high rpms

    Assume the motor was tested at open water, so idles fine, runs strong past idle till say 3/4 throttle (4K) and them misses, bogs down ? When that occurs is it easy to re start it inmediately or will start after some minutes ? Have you tried to check compression with other tester aside from...
  12. Sea Rider

    Should I get this FREE project boat?

    A very nice boat to pass on, was it vandalized where now rests ? Happy Boating
  13. Sea Rider

    Foldable rib, achillies, zar mini ?

    Welcome to IBoats, With how many souls do you plan going fishing with ?, plan assembling, disssambling the Rib every time that will be in use, how do you plan to transport it ? Will add a motor latter... Happy Boating
  14. Sea Rider

    Nissan 3.5B idle too high

    Salute the wild guessing about this particular 2 stroke motor carb. Have never ever had issues with those small portable motors and regularly servicing 20 of them. To begin with, those have a mesh fuel cok located under the tank, will be mission impssible to produce high revs as described...
  15. Sea Rider

    1957 evinrude fastwin 18hp ventilation problems.

    Can you measure the gap distance in centimeters between both lower leg's plates. That lower leg must have at least a 3 inches gap if not more in between both plates. Is the motor running strong throughout the whole throttle range ? if so that motor needs an urgent prop swap to at least a niner...
  16. Sea Rider

    1957 evinrude fastwin 18hp ventilation problems.

    If you have already modified the transom height, with deck load well distributed report at which lower leg height is the water flow paasing by, is it passing above the upper water plate, under it or towards the lower AV plate, for that must pull your head side of motor to check that out, no wild...
  17. Sea Rider

    Suzuki DT 30 overheating problems!!!! photo & video

    What precisely have your rebuilt on that nice sucker motor ? No one should ever test any motor on a bucket for extended time period or will be cooling the motor with heated water which it's nuts. For that procedure need a hose that pours new water in and and some sort of water port at the lower...
  18. Sea Rider

    Yamaha 70B too much Autolube

    That motor must run at the autolube oil setting it was adjused to at the factory, not more, not less. What I like is that at idle the motor will burn much less fuel/oil rate than the usual 50:1 pre mix motors and foul plugs way less. Happy Boatng
  19. Sea Rider

    Yamaha 200 static flush with boat in water

    Assume the motor is flushed OFF, right ? if so, the down issue is that you're only partially flushing the cylinder head area as the thermostat will be closed... Happy Boating
  20. Sea Rider

    2021 Suzuki 9.9 prop

    Firstly test the prop installed independetly of the new one and report each wot rpm achieved with each. Must know the min-max wot rpm range factory stated for that motor, stay with the one that achievd the highest wot rpm. Happy Boating
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