Stbd Manifold hotter than Port manifold

[maddog82]

1998 Mercruiser 4.3L Alpha drive. I noticed today the stbd manifold runs much warmer than the port. The boat runs about 165 degrees, and that's about what the stbd feels like. I can put my hand on it for a few seconds. The port feels luke warm. Is this normal?

 

[Don S]

Re: Stbd Manifold hotter than Port manifold

Usually it's normal at idle, what happens when you give it some rpm and under load?
Water travels the path of least resistance.

 

[maddog82]

Re: Stbd Manifold hotter than Port manifold

Thanks Don. I'll check the temps under load with an IR thermometer.