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Forum: General Q & A

09-12-2008, 11:19 PM

Replies: 3

Gen IV 465 to HP500

Views: 1,401

Posted By supercobrajet

Gen IV 465 to HP500

Bear with me, I am at the beginning of the learning curve here. I have 1992 twins that are supposed to be Gen IV 465hp 502's with Gil exhaust. One motor was rebuilt and "brought up to HP500 specs". ...

Forum: Eliminator

08-27-2008, 09:23 PM

Replies: 6

changing plugs on 27 with twins

Views: 1,327

Posted By supercobrajet

changing plugs on 27 with twins

what is the trick to get to the outboard plugs with twin big blocks?
I've been hanging upside down in the bilge for hours.
I think a 2" ratchet extension may be the trick but I can't get the socket...

Forum: General Boating Discussion

07-19-2006, 02:30 PM

Replies: 11

Mercury 300 promax

Views: 34,586

Posted By supercobrajet

Re: Mercury 300 promax

Another diff, X's have electronic oil injection and the older Promax's have a plastic gear in the oil pump that can fail if the motor is cranked up above the factory limiter (6500). Many people that...

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