You can't effectively view them unless they are obviously bad. Best to replace on a schedule. Cleaning them to get more life is a super way to ruin an engine.
Do they still make an aftermarket manifold and riser for the 1989 OMC 351 engine. If not, surely there has to be some type of retrofit. Any ideas? Thanks.
They still make the manifolds/risers for the 351 but there is only one style. The kind with the rectangular riser mating surface. People have complained of uneven clamping with that design.
Charlie
There is much to be said, in a world like ours, for taking the world as you find it and fishing with a worm.-Bliss Perry, 1904
That reminds me, I want to call Al Prisco and get him over to the boat with his Thermal Imager. THIS sounds like an easy way to tell if the manifolds/risers are working properly.
Favorite Quote: Don't sweat the petty things...AND...Don't pet the sweaty things!! - Steven Tyler
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Risers
Posted - Mar 10 2012 : 19:17:59
