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11-14-2019 03:41 PM

Cam help for a 502

Hi all
from what I can find mercrusier used gm part #12551622

for the stock 415 HP motors
i found gm part #24502611 has sed in the 450 hp motors
has anyone used this in their efi mercrusier motor?

articfriends

11-15-2019 06:39 AM

I have one, PM me

GLENAMY 242SS

11-15-2019 09:20 AM

Smitty, can you install a GEN VI step nose cam into a MARK 4 block?
Thank you.

mike tkach

11-15-2019 09:44 AM

Quote:

Originally Posted by GLENAMY 242SS (Post 4715088)

Smitty, can you install a GEN VI step nose cam into a MARK 4 block?
Thank you.

the answer is yes,just use a timing chain for a gen 6 engine.

[email protected]

11-15-2019 11:41 AM

Thanks

[email protected]

11-15-2019 11:48 AM

I found a Dennis More out of La sells tons of marine parts on EBay and has 100% positive feedback
he sells a custom ground cam for a gen 5 with the specs I think I’m looking for
he says no reversion and no ecm programming needed
this is the eBay item number if interested 312163846855

GLENAMY 242SS

11-15-2019 11:54 AM

Does it, Cam, have a Mechanical fuel pump lobe? or you will need an electric pump on MARK 4 with relay and return setup.

GLENAMY 242SS

11-15-2019 11:58 AM

110 LSA. Anybody have thoughts on this?

Griff

11-15-2019 12:32 PM

Quote:

Originally Posted by GLENAMY 242SS (Post 4715105)

110 LSA. Anybody have thoughts on this?

My thought is I wouldn't run anything less than 114 with stock exhaust

[email protected]

11-15-2019 12:34 PM

My fuel pump runs off the sea pump
it doesn’t matter for my motor

articfriends

11-15-2019 02:11 PM

Quote:

Originally Posted by Griff (Post 4715111)

My thought is I wouldn't run anything less than 114 with stock exhaust

Im not sure, since cam has such lame duration (like the one listed) maybe hecould get away with it?

[email protected]

11-15-2019 02:43 PM

this is the spec sheet

224 degrees intake duration @ .050

230 degrees exhaust duration @ .050

.510 inches intake valve lift

.510 inches exhaust valve lift

110 degrees LSA

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