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I've got my idle at 900 to help with the possibility of reversion since I have a larger than stock cam. That's why I need to set the total, can't do it by base
That is correct in some scenarios...., and is exactly why lobe seperation is important for most pleasure boats.I have always been under the impression that reversion occurs at idle when the cam is overlapping. At the low rpm the gases aren't moving fast enough to keep the water from sucking back into the motor
That is a nice cam but what outdrive are you running? What motor? small or big block?
You are also correct in your understanding of the effects of reversion in some cases......Merc bigblocks (HO) had this issue from the factory years ago and was forced to run a aftermarket exhaust manifold to overcome it. (Gill) I believe but I actually forget, been awhile..
If you have the room under your engine cover you may be able to add some 3-4 inch riser extensions to increase the distance but the ultimate fix is a better exhaust manifold where the water being introduced is father down stream (at the end of the elbow). In my opinion.
That is correct in some scenarios...., and is exactly why lobe seperation is important for most pleasure boats.
On another note.... the Mr. Gasket decals are great, but we must purchase the decal for the diameter of the balancer.
Otherwise, the degree numbers will not be correct.
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