Engine Manifold proplems!!!!!

[lord.jim]

I am gutted had lack of power from my boat. turns out i have a crack in the manifold!!! and has let small amount of water in engine!
Has anyone else had this on 3ltr mercurser?
i think its going to cost me big

[1080]

If you have a crack in the manifold it could be down to frost damage.

I know of people who have had the same problem and its been sorted on their boat insurance. so not so costly !!!!


Good luck

[saltwater_cowboy]

As your posting in the saltwater section then I guess your a coastal rider? If so its more likely a corrosion issue.

The elbow or riser will have corroded to the point that the metal around water jaket is so thin it has cracked and allowed water into the engine.

If you spotted this early enough you might just get away with replacing the manifold and riser. If not and you've allowed water to sit in the engine then you could be in for a rebore, new rings, shells and bearings.

This happen to 2 club members last year on thier 3L mercs. One left it a little too long and is now running in his brand new engine.

If you flush after every use you should get 7 - 8 years from you manifolds but its adviseable to remove them after 3 - 4 years and have a good check inside to prevent this from happening.

[lord.jim]

I am a salt water rider, so salt is the big problem, i think i have caught it early. its one of those things that when u know the symptoms u can catch it earler. i thought it was a fuel issue as it was generally on accelaration but ohh no it aint.

Thanks for ur input

Gutted just want my boat back!!

[Bigtoe]

I was the lucky one who didn't have to change the engine Same as me thought it was a fuel problem but turned out I just had to change the riser pipe and grind flat the manifold for a good leak free fit. Once you are aware of the change in running its pretty easey to pick up on. It took about three attempts to stop the gasket leaking hense me having to grind it flat. Should really have changed both manifold and riser tube in one but was a bit skint after fitting PP , sarter motor, alternator, boat cover and fitting monster racks and mirror last year.

Good luck with it

[lord.jim]

Hopfully i will be as lucky as u bigtoe. should find out 2day!!!