07-19-2007, 04:26 PM #1
- Join Date
- Jul 2007
changed top end, rough idle and deto sounds
Well I changed my pistons and rings and all gaskets, put it all back together, started it up and heard sounds of detonation with a high rpm. Stopped the engine, pulled the plugs and found oil or fuel/oil mix on them. Tried starting it again and had similar sounds but when I pulled the choke the rpms went down and the deto stopped. But after a few seconds the engine shut down but no deto sounds. Did it again and same result. No deto with choke pulled, but it died. Plugs still are wet with oil or oil/fuel mix. I put some oil in the gas tank as a breakin method. I also checked the spark by hand( i know not that safest way), but i put one plug wire on the ground rod and the other in a plug and held it while cranking. I didnt see a spark at the tip, but i did feel a surge through my hand. Is this normal? Is the wire bad?
07-22-2007, 01:57 PM #2
- Join Date
- Feb 2006
- Warner Robins, GA Home of the 2007 All-Star Little League World Champions!
07-23-2007, 03:33 AM #3
07-24-2007, 06:01 AM #4
Piston slap is often heard on the 800's and 951's. Also, did you use new gaskets on the intake or re-use the old ones? Had a 951 with a vacuum leak around the reed cage that caused high R's. Have you checked for a leak while running? I use starting fluid (Ether) and spray around the seals. If the R's climb then you found your leak.
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