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  1. 9

    Yamaha 150 4 stroke - change of rotation

    props are a lot easier to find than lower units, and I see no reason for the motor to be louder or choppier, what ever that is
  2. 9

    spark plugs

    back in the good old days I think they put resister plugs on cars motors to help reduce the radio noise I am not sure why they went to R plugs on boat motors
  3. 9

    1985 Yamaha 9.9SK

    points worked so well that even when you set them with a feeler gauge you still had to check and readjust with a dwell meter to get the set properly. also had to replace them every year and maybe even more often if the cap went bad and caused the points to arc too much and pit. not to mention...
  4. 9

    alarm when turn the key on

    it is always best to drain the main tank before removing the level sensor to keep any bad stuff from going into the pump. and always replace the gasket/strainer with new when putting back in, getting trash into the oil pump is bad
  5. 9

    Lack Of Power Under Load

    110 is good enough. testing the peak voltages into and out of the CDI will be the best thing to do to tell if one of the components is a problem. timing light will show if all 3 cylinders are getting spark and if the timing is in spec and advancing properly draining an in board tank may not get...
  6. 9

    2017 Yam ran fine then near stall, now runs and idles rough. WHY?

    when problems show up it is good to check compression or leak down on all cylinder, spark to all plugs, timing of the spark, and fuel pressures. doing what testing while the problem is there should lead you in the direction to fix the problem. hard to believe the shop did no testing as all
  7. 9

    What is this tube for on a Yamaha 60LB

    is there a hole in the end piece or is it a solid plug? if a hole, need to plug or water will come out underway carries water pressure from lower unit front edge to indicate speed
  8. 9

    Fuel mixture WOT 1986 Yamaha 30 hp 2 stroke

    back when I was fighting an over rich condition at high rpms on my C40, I never found any info on measuring the size of the jet holes. so I bought a new one and measured it and my old ones with different drill bits to find out someone drilled out the main jets
  9. 9

    Yamaha 115 4 stroke, starting problem

    if it is already in neutral to start, why are you trying to put it in neutral
  10. 9

    2007 DF 300 HP Suzuki has 1 beep every 5 seconds

    I did not ask if tach lights showed anything. I asked what was beeping, because you said the motor is beeping. I do not remember seeing any motor that has a device on it that would beep. ignition switch or a tach could have a device that makes noise. Suzuki some times have beeping to notify the...
  11. 9

    2007 DF 300 HP Suzuki has 1 beep every 5 seconds

    is the engine beeping or the tach itself? Could it be a maintenance time warning
  12. 9

    Worth fixing 1998 Yamaha 25HP 4-stroke?

    compression or a leak down test will tell if the cylinders seal properly. pulling the stat and head to inspect will give you an idea of how bad the cooling passages are
  13. 9

    1996 Suzuki DT65. SEIZED!

    some have no idea the crank and rods come as a set. and there are very specialized tools needed to take apart and put back together. getting the pistons out of a motor that will not turn/rotate is not an easy task
  14. 9

    Yamaha cam roller part number?

    just pry it off but I would wait until you have the other one in hand
  15. 9

    High RPMs but low speed

    fouled boat bottom or extra weight . water getting into the pontoons ? spun prop would mean high RPMs with little forward motion so would a damaged prop
  16. 9

    1996 Suzuki DT65. SEIZED!

    rusted crank and bearings? what do you plan on doing to clean that all up? or junk the motor?
  17. 9

    2003 Suzuki DF140 Nothing Out of Telltale.

    well if 18 goes to the TT then follow that back to see if the place it comes from is plugged up. it does not look like it has anything to do with the oil and fuel cooler
  18. 9

    2003 Suzuki DF140 Nothing Out of Telltale.

    can you tell which hose on that parts diagram goes to the tell tail? I know nothing about this motor, but If I had to guess , I would think that the fitting # 6 at the bottom of the diagram is where the water comes out of the block flowing to the fuel and oil cooler
  19. 9

    1996 Suzuki DT65. SEIZED!

    with an overheat, I would pull it apart to inspect the cylinder walls and pistons. but a locked up lower unit could also stop a motor from turning, drop the lower unit to rule that out
  20. 9

    1988 Yamaha 175 screaming idle at startup

    I would be looking at the throttle plates and linkage to see if they are not closing back to idle position, and look to see if the timing linkage and plate it loose or stuck a WOT timing
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