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  1. 9

    2003 Yamaha 50 hp 2 stroke

    have you put a timing light on the motor to see exactly what the idle timing is when cold and after the motor has warmed up? also when at high RPM. good compression, good spark at the correct time, and proper fuel to air. test what you can and then chase the fuel to air my 1999 C40 had a bad...
  2. 9

    2003 Yamaha 50 hp 2 stroke

    did the new middle carb come with a new prime start assembly?
  3. 9

    Suzuki 2007 DF115 Cranks But Won't Fire

    30 hours in 17 years is not good for a motor. I am not sure what 100% gas is now a days. seems that motor has spent it's life sitting and not having much fresh fuel fed to it. good luck with it from now on, but you need to run it more often
  4. 9

    Cant find the year of my mot

    1987 https://www.boats.net/catalog/yamaha/outboard/1987/40hp/40sh?msclkid=ea86595ff8841b3160a83fb4247bc583&utm_source=bing&utm_medium=cpc&utm_campaign=TNT_Text%20-%20DSA%20-%20OEM%20Parts&utm_term=yamaha&utm_content=Yamaha
  5. 9

    Cant find the year of my mot

    what country are you and your motor in? can you post that letters are after the 40S
  6. 9

    slight gas in oil 2009 yamaha 4 stroke

    only way to know if you have the motor propped right is to run it WOT to see what RPM it gets too. you do not have to keep running it hard tho
  7. 9

    15HP Yamaha overtemp light

    service manual for your motor will have the specs. I would think most motors would be the same, but I cannot say that is true
  8. 9

    15HP Yamaha overtemp light

    all I can think of is to do a chemical clean of the motor, good chance there is a buildup in the cooling passages. WOT burns more fuel and creates more heat. and it is not a good idea to keep running a motor that is overheated . the motor lets you know there is a problem, so you need to shut...
  9. 9

    Suzuki DT16 1980s

    find the part number for that part on your motor, and then do a web search for that part number
  10. 9

    slight gas in oil 2009 yamaha 4 stroke

    why? was that all you could get out of it?
  11. 9

    slight gas in oil 2009 yamaha 4 stroke

    make sure the stats operate in spec., cold motor makes oil sometimes slow running, idling, or trolling tends to make oil too over propped does to I think. what RPM will it hit at WOT
  12. 9

    1994 Suzuki DT140 High Idle Issue

    spark to the spark plugs going to them before top dead center, instead of after top dead center while at idle. a timing light hooked to #1 spark plug will show what it is doing
  13. 9

    1994 Suzuki DT140 High Idle Issue

    throttle not going all the way back down to idle or timing staying to far advanced are my only guesses
  14. 9

    1993 4stroke t9.9elhr

    a pic is worth 1000 words. how is anyone supposed to guess at what wires you are talking about
  15. 9

    90 Yamaha 2 stroke overheat

    if you cannot get it out , you can always try putting it back together and hope it seals up OK. might use a little gasket sealer also
  16. 9

    Suzuki DT85 Head Scratcher

    maybe you need to add a foil to you lower unit or transom wedges to eliminate the porpising. my used 16' aluminum Express came with a tail on the Yamaha C40TLRX motor. I removed it and had to get my brother to sit on the front of the boat to stop the porpising. I put the tail back on
  17. 9

    2005 Yamaha 4 stroke low idle when warm

    it probably would help if we knew what motor you are talking about but the idle air control valve would be something to check on
  18. 9

    Gears grinding after re- install drive

    Not that it will help you, but I did find my brothers C60 had a twisted shift shaft and a bent thru pin in the output shaft some years ago apparently from someone trying to shift it while the motor/shafts were not turning to help the dogs line up if the shifter and motor are in the neutral...
  19. 9

    Yamaha 90HP 1999 2 stroke not putting out water

    time to take it apart to see what is wrong and needs to be fixed before throwing it away, maybe just a head gasket or head, or plate in exhaust
  20. 9

    Yamaha 90HP 1999 2 stroke not putting out water

    blown head gasket, or corrosion hole in head or exhaust plate would be my guess
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