Hydrolocked engine 5.7 0m643181

[golfwins]

I ended up going with Mercury manifold and elbow. I'll check the gap on all of the plugs. Thanks!

[golfwins]

Just updating this thread. The new manifold and riser resolved the hydrolock issue and even better got my boat running strong again. I have another thread I'll update in a bit, where I couldn't get my boat on plane. That's not an issue any longer. I bought this boat knowing it had an engine issue and got a big discount because of it. Big enough to replace the engine if needed. Luckily it was a cracked manifold this whole time. Thanks for all the help.

[shrew]

Did you just do one side? They are usually swapped out in pairs.

[golfwins]

I only did one side since this is a freshwater boat. I'm thinking that this manifold froze at some point. It's on the opposite side of the heater and the heater is pretty weak. I've purchased a new heater and I'm going to try to rebuild the old heater to have as a backup. I do think that I'll do the other side next season. I mentioned that my boat is running strong again, but I'm not sure if it's running perfect. I'm hitting between 35-36mph. I think this boat is supposed to get around 39, but it is almost 20 years old.