I put my motor back together and it surges. I started to think about it and it's always done this since I got the boat. I checked all the usual things vacuum leak around the gaskets etc. sprayed starter fluid around and didn’t get anything. I have had two different sets of carbs on there surges with both. I am running a little 177 blower but I don’t think its big enough to create blower surge. The surge is anywhere from 200-400 RPM and it doesn’t happen quickly it happens slowly. It almost sounds like its going to die but then the rpms pick back up and it idles fine.
What can cause this?
Specs: SBC, 30/30 cam, lash 24/26, 177 blower set at 7lbs. Duel 400 carbs. Eletronic Ign.
Don’t know if you need any more info.