douglee25
Well-Known Member
Thanks. I did that as soon as I sent my post. Motor won't budge.
With all plugs out try using a breaker bar to turn over the motor.
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Thanks. I did that as soon as I sent my post. Motor won't budge.
When you swapped out the raw water pump, was the impeller in one piece? If not, did you find all the pieces?
Im not savvy with the B3 and your setup - but is your raw water intake from the drive, or from a thru hull? Also assuming raw water cooled? Is the B3 the one thats can end up with Bravoitis?
This post is a bit confusing as it appears it was started by another member.
When you chiselled the broken pieces out of the exhaust, did you get it all? Does not appear so from the pics you posted. Did you remove the Y pipe to make sure there isn't a restriction in the bottom? The flappers at the top of the Y pipe will not take a lot of high temps. They too can fail and drop down.
Have you been monitoring the manifold temps? It is a good indicator of raw water circulation. You should be able to hold your hands on them.
4000 rpm is low for WOT. You are low in HP or over propped.
Just start a new thread of your ownNot sure what you mean by double hijack? Meaning I'm basically screwed....lol?
Finally took the elbow off again, and the flex exhaust tubing. I see a hard oval tube in the bottom behind the motor. It has some kind of rod going through the middle and some deformed rubber thing straddling the rod. Must be the flappers. I can't tell but can this (Y-pipe?) be removed from the bilge or do I need to have the outdrive taken off the back to get to it?This post is a bit confusing as it appears it was started by another member.
When you chiselled the broken pieces out of the exhaust, did you get it all? Does not appear so from the pics you posted. Did you remove the Y pipe to make sure there isn't a restriction in the bottom? The flappers at the top of the Y pipe will not take a lot of high temps. They too can fail and drop down.
Have you been monitoring the manifold temps? It is a good indicator of raw water circulation. You should be able to hold your hands on them.
4000 rpm is low for WOT. You are low in HP or over propped.
Seems a trip to the marina is in my future. Thanks.Engine has to be moved forward or out.
Why would you want to take the y-pipe off ? No need unless it's leaking at the mounting surface, them flappers just pull up and outSeems a trip to the marina is in my future. Thanks.
My exhaust elbow was completely rusted. (scroll to top of this thread for picture) I replaced manifolds, risers, elbows, thermostat, removed raw pump and visually inspected impeller. Engine overheats at cruising rpms. Found one chunk of rusted metal wedged in upper exhaust tube. Maybe something is wedged way down there where I cant see it.Why would you want to take the y-pipe off ? No need unless it's leaking at the mounting surface, them flappers just pull up and out