Quote:
Originally Posted by verytricky
Possibly the 375 Hp engine and not the 600Hp engine? - Cause the 496 made by mercury is a 375 Hp engine....
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They also make a 455hp (425 at the prop) version of the 496 (the HO).
But I suspect the motors in question are the Mercury racing 600SCI's, which are actually 502ci, (8.2L), not the 496ci (8.1L) block. That 502 is the basis for quite a few of their High Perf motors over the last 18 years, inc the HP465, HP500, HP525, 600sc & 700sc.
Can't help on the service intervals though I'm affaid.