Mercruiser 4.3 exaust manifolds

[cory43112]

Have a '99 4.3L and the starbord exaust manifold gets fairly warm to the touch while the port side stays cold. Normal or not? thanks

 

[directorsusa]

Re: Mercruiser 4.3 exaust manifolds

you probably have blockage at thermostat housing. I had the same problem, but burnt up my exhaust hoses because of pieces from old impeller blocked water flow to exhaust.

 

[z284u2try]

Re: Mercruiser 4.3 exaust manifolds

normal. I say if you can hold your hand on it your good.
My boat has always run the same way.
I beleive it is do to how the water is routed in the engine