Search results

Thanks Kenny, for the suggestions. This may be the issue but I may not be knowledgeable enough to figure this out. The cylinder heads were rebuilt by a professional about 14 years ago. As I have tried to fix the current problem, I have looked for a broken spring. While i can't see a break, a...

Thank you. I will try that. I have hooked up a vacuum gauge and the vacuum is kind of erratic with the bad idle. When it occasionally idles well, the vacuum is steady. I didn't think of checking the primary throttle shaft. I have heard that can be a problem with quadrajets.

The one local person I found that would work on my boat said he doesn't work on old motors and that he would put in a new motor because he has had some many problems with rebuilt ones. When I told him it was reverse rotation, he "reversed" and said he would put in a rebuilt one. When I asked...

Thanks, Lou, for the quick response. I sprayed some starter fluid around the intake gasket while the engine was idling but saw no change in idle speed like you might expect if it sucked in some air but maybe there is a better way to check that. To check the intake valve, I bought a leak down...

Hi Scott, thanks for the quick response. The dwell spec is 30 degrees. After several adjustments I have it set to 29 degrees. The fuel was fresh when I started but it is several years old now, though I do use stabilizer. For most of my tests now I have the fuel pump draw fuel directly from a...

Hi everyone, I have a 1973 Penn Yan tunnel drive boat with an OMC 250 inboard engine. My dad bought it when I was a kid. The engine is a small block Chevy 350. In 2022, the original manifolds had internal cracks that let water into the cylinders when I was winterizing the boat. I didn’t realize...