This started before complete rebuild. I was told it was the heads and pd a marine mechanic co to rebuild them. when I reinstalled them there was no change. So I decided to do a complete rebuild including the heads again by a different co. still no change. If I spray a steady stream of W40 in...
carb rebuilt, eliminated all electronics( went straight to battery.) coil is good. timing is set correctly according to the mechanic that rebuilt it. new spark plugs twice and new wires to plugs in order. pvc valve assembly is good. did a smoke test and found a leak in intake manifold gasket and...
Thanks you guys for getting back to me. The back fire happens when idling in the intake manifold, its not real loud and almost sounds like a knocking noise. When you throttle up it makes on big pop then the noise seems to settle down some. At idle when i use a stethoscope and touch the intake...
Thank you guys for your input, sorry for the delay getting back to you all. life happened. Turns out the transom shield was badly eaten up by electrolysis and salt water. ( the grounding wires were not connected ) the seal channel at the Y pipe was deteriorated and leaking and the Y pipe had a...
Not sure if this is the right place to post, but here goes.
I have a ford 351 Windsor marinized by Volvo Penta. I developed a light back fire coming from the intake manifold. When you quickly push forward throttle it makes one loud back fire . I just had the engine completely rebuilt, along with...
i keep the boat on trailer, in a home made boatel out of weather. it started dripping slowly two seasons ago. this season it was dripping a lot faster. motor not running. makes no difference in flow i could barely see , but looked like drips were visible under the exhaust Y tube going through...
thanks for the reply. i removed the engine last week and will do some exploring. I'm hoping its one of those you mentioned. I hope its not the transom shield itself. i will try and send video.
