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The back voltage you refer to is called excitation and its that which the regulator manipulates to control output voltage . Some alts...

If your motor truly has 210 psi cranking, it's a 13:1 drag racing motor Mercruiser manual states cranking psi is 150 per cylinder Is...

If your motor truly has 210 psi cranking, it's a 13:1 drag racing motor Mercruiser manual states cranking psi is 150 per cylinder Is...

Head has had work done prior. The valve guide on right is stock, on left has been cut and a different seal

If your motor truly has 210 psi cranking, it's a 13:1 drag racing motor Mercruiser manual states cranking psi is 150 per cylinder Is...

Scott, reason to mention you is it looks like it has 2 different type seals and have not seen the multi seal ones

Felpro and Mahle both sell seals and gaskets every day, nearly everywhere If your motor has 8 intake manifold bolts, the motor is a...

https://www.drivparts.com/part-details.html?brand_code=BCWV&part_number=SS%2072530&part_name=Engine%20Valve%20Stem%20Oil%20Seal%20Set...

I can't imagine they are marine specific. The heads are just plain old Chevy V6 heads. Take the casting # off the head and go to a GM...

You just did!

Yes. They are the same as automotive seals.

Doesn't change my comment, motors that run on 87 octane do not have compression numbers that high. If motor was designed to run on 93...

I don’t think so it’s just be careful with jumpstarts and keep in mind sobs boats only have a 55 amp alternator not like on the vehicles...

Seasoned mechanic did the plugs, wires compression check.

Is anyone suggesting that electrically powered devices be kept turned off to the maximum extent possible in order to help the alternator...