Recent content by 99yam40

  1. 9

    Yamaha 50hp rebuild ?

    I sent in my C40 crank to have it rebuilt some years ago. they just sent me one that they put all new bearing into and seals, for around $400 me and a friend put it together in my den inside my house ty raps work once you get the 1st piston into the block the ty raps slide off the piston and...
  2. 9

    Yamaha 50hp rebuild ?

    I have used ty-raps before to get the rings orientated correctly and a little compressed and just cut the ty raps as the pistons go in
  3. 9

    Help with #1 cylinder location- 2007 df250

    I would venture to say all the outboards I have seen the very highest cylinder is #1 even on vehicles the farthest forward was #1
  4. 9

    Please help with HPDI issues

    I have never seen an air filter on any outboard motor. could that have something to do with no one mentioning one in the thread, except for Mr. Obvious?
  5. 9

    2001 Yamaha 8hp 4 stroke

    man o man if that help offends you, you must have a tough time going thru everyday life
  6. 9

    2001 Yamaha 8hp 4 stroke

    there are cooling passages everywhere did you notice it hits a tee and heads to other places also
  7. 9

    2001 Yamaha 8hp 4 stroke

    looks like it heads to this part whatever that is. maybe intake manifold
  8. 9

    2018 Yamaha 40 HP, Poor top Speed

    do you have a tach or are you just guessing at RPM? you keep saying speed, so I have no idea if you mean boat speed across the water or RPM. there is no reason I can think of that a motor would make a loud noise like a muffler fell off when it just lowered RPM. motors make more noise at higher...
  9. 9

    Yamaha 40 hp 3 cylinder wont accelerate

    then check what the timing is doing so you know what is going on
  10. 9

    Yamaha 40 hp 3 cylinder wont accelerate

    If the timing does not stay in spec at idle on the proper mark or WOT there is a problem. someone has jacked with the linkage to get it to even run and probably not in a good way. my guess is the CDI is bad
  11. 9

    Yamaha 40 hp 3 cylinder wont accelerate

    only way to know what timing is doing is to hook up a timing light and see what it is doing
  12. 9

    Yamaha 40 hp 3 cylinder wont accelerate

    extra fuel and advancing timing is needed when throttling up. test what you can and then chase fuel
  13. 9

    Decompression valve

    trade it in on a electric start model
  14. 9

    Decompression valve

    I would at least talk to the dealer to see if that motor has a decompression valve. I have no clue if they do or don't
  15. 9

    2018 Yamaha 40 HP, Poor top Speed

    when the loud noise shows up, does the RPM go up or down?
See more
Top