J
Joseph P. Reis
Guest
"I have an unusual timing issu
"I have an unusual timing issue with my port Mercruiser 454 engine. After setting the timing to the appropriate setting at idle, the timing reads fine until a little after 700 rpms. The timing then jumps about 10 degrees when we cross about 720 rpms. This happens every time, regardless of how slowly we bring the rpms up. Due to this jump, we get a top number of 35 degress at a little over 3000 rpms, which is not good. We have changed out the electronic module with one that we know works. The problem is still identical, even with the good electronic module. The engine is the counter-rotating of the two engines. Does anyone have any idea what could be causing this 10 degree "jump" when crossing over the 720 rpm limit?"
"I have an unusual timing issue with my port Mercruiser 454 engine. After setting the timing to the appropriate setting at idle, the timing reads fine until a little after 700 rpms. The timing then jumps about 10 degrees when we cross about 720 rpms. This happens every time, regardless of how slowly we bring the rpms up. Due to this jump, we get a top number of 35 degress at a little over 3000 rpms, which is not good. We have changed out the electronic module with one that we know works. The problem is still identical, even with the good electronic module. The engine is the counter-rotating of the two engines. Does anyone have any idea what could be causing this 10 degree "jump" when crossing over the 720 rpm limit?"