Where should Spark occur....TDC??

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Where should Spark occur....TDC?? by: relaxinrob - Sept 7, 2013 22:13:43 GMT -5

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Post by relaxinrob on Sept 7, 2013 22:13:43 GMT -5

I am swapping engines from a MZ Moskito to a CPI Oliver City. They both use a CPI engine, but the stator for the Oliver was different and the shaft size for the flywheels were different so they could not be swapped. It would not start with the flywheel from the MZ on it and I suspected it was not gettin the right pulse to fire at the right time. So , I took the hub out of the MZ flywheel and riveted it into the flywheel for the Oliver. I am getting spark at Top Dead Center (TDC). I have

lbs of compression and I have gas getting to it, but it will NOT fire!! I have done everything I can think of, so I am coming to you guys for a fresh idea to get it running......HELP!!!

Last Edit: Sept 8, 2013 13:41:13 GMT -5 by relaxinrob

tvnacman PM tvnacman tvnacman's Posts tvnacman's Threads Senior Rider Currently Offline Posts: 2,256 Likes: 206 Joined: Feb 24, 2013 14:17:35 GMT -5	Where should Spark occur....TDC?? by: tvnacman - Sept 7, 2013 22:27:08 GMT -5 Reply Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by tvnacman on Sept 7, 2013 22:27:08 GMT -5 I think 95psi is too low for it to fire . John
	Talk to Tvnacman at www.nycscooterparts.com/ Chinese scooter parts , cdi , coil , GY6

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Where should Spark occur....TDC?? by: alleyoop - Sept 7, 2013 22:45:45 GMT -5

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Post by alleyoop on Sept 7, 2013 22:45:45 GMT -5

TVNACMAN is right, 95psi is very low, the least would be 120psi and that is on the edge will not have much power to pull a lot of weight.

Check if its your rings, pour a little oil in the spark plug hole and re-check the compression, If the compression rises its your rings.
Now don't forget hold the throttle wide open when checking the compression.
Alleyoop

Last Edit: Sept 7, 2013 22:47:50 GMT -5 by alleyoop

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..BAD TO THE BONE..

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relaxinrob PM relaxinrob relaxinrob's Posts relaxinrob's Threads New Rider Currently Offline Posts: 34 Likes: 0 Joined: Apr 16, 2013 12:07:25 GMT -5	Where should Spark occur....TDC?? by: relaxinrob - Sept 8, 2013 8:22:39 GMT -5 Reply Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by relaxinrob on Sept 8, 2013 8:22:39 GMT -5 but this engine ran fine on the other scooter?

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Where should Spark occur....TDC?? by: alleyoop - Sept 8, 2013 15:01:06 GMT -5

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Post by alleyoop on Sept 8, 2013 15:01:06 GMT -5

It could be however you riveted the flywheel it is probably the timing to RETARDED. Normally the timing falls a little before TDC. See if you can move the timing a little before TDC.

TAKE a picture of what you did the FLYWHEEL and whatever you riveted.
Alleyoop

.

..BAD TO THE BONE..

PST150H 62mm BBK, 60mm Crank, 16/37 Tranny Gears..MOW-POWER

WATCH OUT...THOSE WHO DO NOT KNOW, DO NOT KNOW THAT THEY DO NOT KNOW

Where should Spark occur....TDC?? By relaxinrob (Read 490 times)

Post by relaxinrob on Sept 7, 2013 22:13:43 GMT -5

Post by tvnacman on Sept 7, 2013 22:27:08 GMT -5

Post by alleyoop on Sept 7, 2013 22:45:45 GMT -5

Post by relaxinrob on Sept 8, 2013 8:22:39 GMT -5

Post by alleyoop on Sept 8, 2013 15:01:06 GMT -5

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