invader_1230
Cadet
- Joined
- Jul 2, 2005
- Messages
- 10
hey, i just bought a 1968 40hp johnson electromatic outboard, which thankfully shifts and runs. BUT when it is idling it backfires, but when it does a flame shoots out of a threaded hole in the intake manifold and when it is running full speed exhaust is shooting out and there is oily gas that sprays out of this hole also. i thought that there should be bolts in this hole, but i checked another engine and it too does not have anything in these holes. i feel i am probably not getting full performance since it must be sucking in way to much air through the holes. any information would be great, thanks