Mercury 525 EFI 502 CID
I have 2 of the Mercury 525 EFI 502 CID engines I am trying to rebuild. I cannot find the serial number or model of engine in the specs label it is either gone or never been printed on it. I am trying to figure out which exact model and year the engine is to order parts for it. The Block has the numbers C272, C12561358. The cylinder head has the number 900 843425. The Intake: 12550669. The pistons have the number 843302A1. Would appreciate any help. Are there even parts available for it anymore?
Model: HP525 EFI Displacement: 502 C.I.D. Max WOT RPM: 4800-5200 Spark Plugs: NGK BPR6ES Spark Timing: Non Adjustable Fuel Octane: 87(R+M)/2 or 92 Ron International Engine Oil: Mercury/MerCruiser 4-Cycle 25W40 Engine Coolant: Dex-Cool Thanks |
look on the block where the heat exchanger bolts up, I found these on Merc 500 EFI's
https://cimg5.ibsrv.net/gimg/www.off...5b78bceaff.jpg |
Should be a label right on the left side of the heat exchanger if you were looking at the front of the motor. May be another on on the back of the motor somewhere but not sure, I might be thinking of the transom assembly.
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Originally Posted by IGetWet
(Post 4802257)
Should be a label right on the left side of the heat exchanger if you were looking at the front of the motor. May be another on on the back of the motor somewhere but not sure, I might be thinking of the transom assembly.
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There are only a few minor changes in all the 525EFI's and nearly all parts are the same.
https://www.mercruiserparts.com/525-efi |
Quick search: Block is gen vi. Pistons are made by wiseco for merc racing.
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Originally Posted by Griff
(Post 4802280)
There are only a few minor changes in all the 525EFI's and nearly all parts are the same.
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