Thread: finally find my gremlin
09-15-2007, 11:42 AM #1
finally find my gremlin
Today i took my motor out because I'm going gas valves. So while the engine was sitting on the bench i figured let me check the phase on the crank, So i pull out my degree wheel and set it up. So i find true top dead center for number 1 set at 0 turn motor to number 2 it's right at 120 degree's so it's on the money. turn to number 3 it's at 248 degree's 8 degree's out checked it 4 times same results. Crank turned on last cylinder 8 degree's. That explains why i have been loosing rpm's every week went from 7230 rpm's to 6970 rpm's So glad i decided to check the phase other wise i would have put it back together with the same problem.
09-15-2007, 11:53 AM #2
Jim, I could have told you that,
I guess after over 500 hours it was time for a new crank, don't ya think?
09-15-2007, 12:12 PM #3
Hello Larry, The 1300 motor went in my wifes ski so this is not the 500 hour crank.
09-15-2007, 03:24 PM #4
Glad you found the problem.Bet you have it T/W now. Its a relief isnt,finding that lil` MOFO that has had you boggled for a while.Good job Jim.
09-15-2007, 10:09 PM #5
- Join Date
- Aug 2006
Thanks for the post Jim, I had been on the line trying to decide on a new crank, or completely rebuilding mine, with a better front bearing and T/W. I sent mine to Crank Works yesterday, and now I know I did the right thing for my 1390. Good thing you checked it. Hope its faster than even when done!
09-15-2007, 10:14 PM #6
- Join Date
- Jul 2007
- Baytown, TX
How much should I expect to spend if I sent my old stock crank to crankworks?
It just spit out the cage on the #2 main bearing no physical damage to crank.
09-15-2007, 10:17 PM #7
Glad to see you find the problem Jim!!! Thats the kinda thing that can haunt you. Hope not to much down time.
09-16-2007, 10:23 AM #8
Amen Iam glad to hear this cause we all ( florida crew) know how fast that thing really is
09-16-2007, 11:34 AM #9
- Join Date
- May 2005
Glad to hear you found it
09-16-2007, 04:53 PM #10
Great info Bro! It's been awhile dude,you gonna make it to WF's This year?
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