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HELP ...my motors
i took the heads off to ck everything out(make sure the mice didn't make a nest in there etc.)
the cylinder walls and pistons look good nice and tight, so then we pulled the cam out of one, and 5 of the lobes have little flat spots ,not good..... think i'm getting 2 new cams and lifters now..... any help on cam selection would be appreciated.... these motors were supposed to be rebuilt by a local reputable machine shop about 6 - 8 years ago and have been sitting ever since(hence cking for the mouse nest) the heads i have are 048 casting, they do not look like small peanut ports to me , and the valves look rather large also.... the pistons look to be 30 over as .030 is stamped in the tops i will take pics of the heads and the pistons to see if someone here can help me figure out what i have.... the cams i was thinking of getting are Part No.: 315-132561 Category: Engines & Parts-Cams & Lifter Kits Crane PowerMax Cams Description: PowerMax - Fair idle, standard camshaft for Mercruiser 400, 405, 420 425 HP and 525SC-454 CID engines, applicable to 350, 365, 370 HP mildly modified engines with free flowing above water exhaust DEG. DUR. @.050 INT / EXH 228 DEG. ADV. DUR. INT / EXH 298 DEG. LOBE SEP. 114 OPEN / CLOSE @.050" CAM LIFT INT /EXH 5 / 43 LASH HOT INT. EXH.000 GROSS LIFT INT. EXH. .530 pics will be up soon, any help will be greatly appreciated |
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pistons
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valves in head
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Intake ports
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exhaust ports
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ttt
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Check the valves to be sure they don't leak. If you are close to Highland NY, pm me and I'll give you a shop to call Paul
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help i need to order cams , need some good advice, will the cam i picked above work good yes ? no ??
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Those will work great. Better if used with a Holly 800 and an Performer Air Gap manifold. Smooth idle, good power. I've had Merc 400'S and 420's. Good running reliable engines.
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ok here's what i have
merc 330's 030 over( fresh bearings and rings) massive bassett offshore water jacketed headers long tube(5") holly 850's with vac sec orig q jets carbs brand new dui distrib's performer intakes the above heads, (which i can't seem to idenifiy ???) 048 is the casting # are they large or small ovals?? i need to put these baby's together and get in the water. 40scarab thx (theres one for the cams i picked) other opinnions Please..... |
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