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  1. 9

    4Cyl 2Strk lower cylinder won’t fire. Has spark but low compression.

    low oil level in tank on motor is the only part of oil system to set the alarm and RPM reduction. But I do not believe only one cylinder would be affected if it was oil level problem Not sure, but think it does a random spark interruption to limit RPMs
  2. 9

    4Cyl 2Strk lower cylinder won’t fire. Has spark but low compression.

    also the lower crank seal may be letting air in leaning out the lowest cylinder Not sure how many fuel pumps this thing has, or what crank case they are tied to. but if a pump leaks fuel into a crankcase, that cylinder will be too rich and not fire/burn the fuel properly
  3. 9

    2007 Yamaha 200 four stroke what fluid goes in the trim/tilt

    Not sure about your motor, but My secvice manual for my C40TLRX calls for ATF Dexiron II
  4. 9

    Tell Tail pressure difference

    using both and running the motor would be a good idea. the motor warms up and stat opens to help remove salt from all passages
  5. 9

    Tell Tail pressure difference

    you still have not said how you are flushing the motors
  6. 9

    2005 90hp Yam no spark.

    I though they used one each for #1 and #3 with #2 being created with input of the CPS. Maybe that was some other motor
  7. 9

    2005 90hp Yam no spark.

    Looking at part breakdowns the 2 stroke 90 used a crank sensor since 92. from what I remember seeing they used 2 pulser coils and one crank sensor to tell the CDI when to spark the plugs. My 99 C40 uses 3 pulser coils to do that they do not show separate lighting and charge coils on the 90...
  8. 9

    High Voltage Yamaha two stroke 75 HP 2015 model

    I figured as much, the edit ability goes away quickly sometimes
  9. 9

    2005 90hp Yam no spark.

    I have no manual for a 90. Seems that sight sells CDI electronic aftermarket parts, but do not list any newer for the 90 along with the troubleshooting guide from CDI I guess they used different names for parts back in the old days now a days they use names like the CDI, lighting coils...
  10. 9

    High Voltage Yamaha two stroke 75 HP 2015 model

    I would think 17.5 vdc would not be good on a battery over a long period, I am sure that is why Boscoe asked about what kind of battery that 70 amp battery is. I also have no heard of a 70 amp battery before. What are you measuring that voltage with and exactly where are you taking the measurement?
  11. 9

    Suzuki DF 150: which thermostat, 122 or 160 deg F?

    the higher one will let the motor burn the fuel better
  12. 9

    High Voltage Yamaha two stroke 75 HP 2015 model

    the reason Boscoe says check grounds is the motors generating system makes more power/voltage than needed, the RR should shed the excess voltage to ground to limit what is sent out of the RR. I was wondering why he posted the same thing twice, but see he added a sentence on the end of the...
  13. 9

    2005 90hp Yam no spark.

    I would think that this did not come out of a Yamaha service manual. Where did you find this? some kind of aftermarket thing maybe CDI electronics use to have troubleshooting info online for a lot of different brands of motors and they made aftermarket CDIs for them also
  14. 9

    1986 yamaha 150 pro v oil questions

    make sure it is all going into the fuel system and not leaking out somewhere else. and then make sure your linkage is set properly
  15. 9

    2001 F115 alternator output

    If AMG calls for 14.4 max charging and you charge it at 14.5 or 15, that is over the allowable rate. so that would mean none of the charging systems would be right for them. In reality that small of a difference should not make a difference. battery cells go bad sometimes and most...
  16. 9

    2001 F115 alternator output

    I think a starting battery and some deep cycle batteries for the other things would be better. Is that 8D a battery that is considered a deep cycle meant to deep cycle over and over? most batteries are not
  17. 9

    2001 F115 alternator output

    most have a start battery and then a house battery to run electronics so you should be able to always start the motor Just need to set them up properly
  18. 9

    2005 yamaha 250 hpdi Stator or Rectifier

    why not, you said you were out on the other but kept going anyway, I am out on this one
  19. 9

    Yamaha 3cyl 60hp two stroke

    fuel pump or sucking air maybe does it help to pump the primer bulb?
  20. 9

    Trim Function for Yamaha 90 Four Stroke

    no one would throw parts at mine as I do all of my own and have for more that 50 years. how about you?
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