Originally Posted by getrdunn (Post 4498799)

Not much info on any of those cams going past the old 525-800sc hyd flat tappet .559 lift cam that was used forever it seems.

Originally Posted by MILD THUNDER (Post 4498816)

The 800sc (not 800sci), 600sc (not 600sci), and 575sci, used the same cam. Which was a 240/240 @ .050 .559/.559 lift 110 LSA hydraulic FLAT tappet cam.

525SC, used the same 228/236 at .050 530/551 lift 114 LSA flat tappet cam, that was used in the 400hp, 420hp, and 425hp mercruiser 454ci engines.

Originally Posted by getrdunn (Post 4498830)

Ok Bob.... Pop quiz... What was the 850csi cam now that the op got his answer the best we can figure anyway.

Originally Posted by MILD THUNDER (Post 4498789)

The part #'s for the camshafts, are not the same in merc's parts diagrams, so I would say, no , the 900sc carb engine, did not use the same camshaft , as the 1075 EFI.

The 900sc's were known to be valvetrain eaters. I wanna say they had something like 714 lift solid rollers. They used conventional rockers, basically old school blown big blocks like alot of us have. Nothing fancy.

Personally, If I was rebuilding a 900sc merc, I would go for a milder camshaft setup .

Originally Posted by MILD THUNDER (Post 4498835)

I dont think he got his answer yet. He was asking on the 900sc cam specs. I think the specs you gave earlier, were for the 1075sci cam.

Im so confused now lol

I think 14 apache or someone recently had some 900sc mercs in their shop, maybe they know the 900sc cam specs, or have a grind number off them?

Originally Posted by mike tkach (Post 4498871)

i agree but the op still does not have his answer.i will make a call in the morning to get the answer if no one posts it sooner.