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Forum: Donzi

11-19-2023, 12:22 PM

Replies: 15

502 MPI Issues

Views: 1,223

Posted By Guamache

haha tell me about it!

haha tell me about it!

Forum: Donzi

11-19-2023, 12:21 PM

Replies: 15

502 MPI Issues

Views: 1,223

Posted By Guamache

Hi there, yes I made sure it is a 502 block, guys...

Hi there, yes I made sure it is a 502 block, guys at the machine shop also made sure it is a 502. I installed the same cam. The issue came on before I took the engine apart, ice related or not, I...

Forum: Donzi

11-19-2023, 12:18 PM

Replies: 15

502 MPI Issues

Views: 1,223

Posted By Guamache

Base timing mode?? ...I did not, but I took the...

Base timing mode?? ...I did not, but I took the boat to this guy`s shop, he said he set it in time, replaced the IAC, but did not fix the issue, he thought he did

Forum: Donzi

11-18-2023, 03:08 PM

Replies: 15

502 MPI Issues

Views: 1,223

Posted By Guamache

A machine shop build the short block, crank,...

A machine shop build the short block, crank, pistons, rods and I installed the heads, cam and the rest. Same issue as the day I found out about the block been cracked. Thanks

Forum: Donzi

11-18-2023, 03:00 PM

Replies: 15

502 MPI Issues

Views: 1,223

Posted By Guamache

haha ...I hear you man :cool:

haha ...I hear you man :cool:

Forum: Donzi

11-18-2023, 02:56 PM

Replies: 15

502 MPI Issues

Views: 1,223

Posted By Guamache

Thats right, casting plugs. Thank you SB

Thats right, casting plugs. Thank you SB

Forum: Donzi

11-18-2023, 02:54 PM

Replies: 15

502 MPI Issues

Views: 1,223

Posted By Guamache

I just got a new bare block, same pistons,...

I just got a new bare block, same pistons, crankshaft, rods, heads (tested ok) and cam. Machine shop build the short block and I did the rest. Engine starts, sounds healthy but the issue persist....

Forum: Donzi

11-17-2023, 01:58 PM

Replies: 15

502 MPI Issues

Views: 1,223

Posted By Guamache

502 MPI Issues

Hello everyone here. I want to share my story and see if somebody could get me in the right direction in order to solve it, any comment or suggestion would be appreciated.

This is a Mercruiser 502...

Forum: Restorations & Upgrades

08-28-2019, 01:14 PM

Replies: 11

Options to make my quieter?

Views: 2,828

Posted By Guamache

Options to make my quieter?

Hello group, I bought this Donzi 24, old 70s hull, its got a single 502 with thru hull exhaust, chromed headers, runs very good and its a beautiful boat, but a little loud, in my opinion. I am...

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