WTB: 502 Mercruiser block
 

I need to find a 502 block that hasn't been (now bare with me): destroyed, over-machined, sleeved, pitted, corroded, warped, over-heated, dropped or become the thing of nightmares past.

Reason you ask? I "had" a wonderful block, that I took to have a motor rebuilt into said block...that is now over-machined on one side so the pistons are .032" above the deck height at TDC. And the sleeves were not set properly (gaps at the base of the machining).

So where does that leave me?
(a) in a heap of *^%# and pissed as....well pissed enough to call the attorney...and I hate 'em
(B) in dire need of a block (Gen V) I believe.

Attached is a pic of the area below the timing cover. Hopefully the block you have sitting over under a pile of 3 year old PowerBoat magazines and empty WD-40 cans is the answer to my prayers.

Honest truth: I've paid (the fired machine shop) a handsome sum to assemble the motor once. The intake wouldn't fit in the valley, so I called another shop, who started inspecting the assembled motor and discovering the problems. So now I have a disassembled motor (again) a ruined block, and a dust-covered boat.

I'm crossing my fingers while I scratch off some lottery tickets for engine money and also hoping the inter-web finds me a block...

If you can help... PM me. I'll drive just short of anywhere (except to liberal-land) to get a block.

- Andrew

I don't know about the money side (what you've spent already and how your budget looks) nor do I know about the boat. Maybe you've got twins so you need to match the engines? I've noticed this in the classifieds and it's seems like pretty good value to me. Could you offload the 502 and recoup a bit of the damage and get into a nice 496 instead?

http://www.offshoreonly.com/forums/s...rop-ready.html

Just a thought, good luck with whatever you choose.

RR

Well it's funny you should include that ad, because it's one that I have another window open for. Actually, I'm considering the 496. Bonus is that it's closed cooling.

I appreciate the assist. It's actually going into a 272 Baja. I was having the internals redone with stronger products to then strap a blower to it... although now the blower cash-oline (think: gasoline) has been soaked up by engine bs.

You would know if the 496 uses the same mounting points as the 502 would you?

I can't be too sure about mounting points, my guess would be the engine would drop straight in. Aren't they basically the same block? I'm sure someone here will answer that question very soon.

I love closed cooling and I love later model stock standard engines over something older that's been re-built.

Good luck,
RR

EDIT: Understand about the re-build and the blower, big decisions. Mmmm?

the 496 will bolt right in .however the exhaust on a 496 may be a problem in your boat depending on outlet location ..the 496 elbow is taller
even tougher if you have y pipes and silent choice ..can you swap manifolds and use yours yes ..however that's opening another can of worms as the closed cooling is somewhat connected to it

how about a 525 sc with 90 original hours still sealed ? 603-279-7676

I have two good 502 blocks

Where are you located and how much and any pics?

Detroit, MI , $1,200. . I can take pictures if you are interested

if you want to go 496 i have one

Can you send pic to [email protected]

Chris2k2,

Do you still have one of those 502 blocks? Call me if you do..

616-335-8446,,'

Thanks!
Dick

Call if you still have 502 blocks for sale.
Ron Sporl 504-616-6005

I have a 502 Block (The block number is 14096859 (Gen V with 4 bolt main and thin main bulkheads), have all the internals which include the following
JE Piston 4.500"x4.00"_6.135" + 7cc Dome
Connecting Rods, Forged 4340 Steel, H-Beam, 6.135 in. Length
Cap Screw, Chevy, Big Block, Set of 8
Callies Group Item Assembly Total Seal Ring
AFR BBC 305 cc as cast, Race ready, w/cnc chambers, complete
w/parts
Upgrade BBC Exhaust Valves #7630 or #7631 to Inconel #7633
Upgrade Hyd Roller Spring 8031 to 8002
BBC_Hydraulic roller,step nose,std gear VERIFY NOSE
Distributor Gear Hardened .500" Shaft BBC VERIFY GEAR
BBC Morel Hyd Roller Lifter 4603 1 675.00 675.00
Scorpion Marine Endurance BBC Rocker Arm 1.7RR/7/16
ROLLMASTER Timing Set-CHEV BB GEN 6 DOUBLE ROW
TORRINGTON VERIFY GEN
DEI Distributor
Bob Madara custom CAM

Only thing you will need is an intake and ECM to finish the motor, I ran out time and money with a kid going to college.

Let me know if you are interested