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stlliberator

03-25-2010 05:36 PM

Which thermo for a gen 5 502 mag mpi

Im in need of a new thermostat for my gen 5 502. There is a couple of options, a 140, or a 160 degree..

Throttle Fever

03-25-2010 06:03 PM

Closed or open cooling system? Water pump or bypass?

Boat Tech

03-25-2010 06:05 PM

Quote:

Originally Posted by stlliberator (Post 3074952)

Im in need of a new thermostat for my gen 5 502. There is a couple of options, a 140, or a 160 degree..

You need the 160 degree to keep your stock EFI engine from running to rich and fouling out the spark plugs.:coolcowboy:

Griff

03-25-2010 08:52 PM

All the Merc black EFI engines use a 160* TStat.

ballon78

03-26-2010 06:32 AM

160 just removed mine last month. Make sure you get a new cork gasket up top too, they turn into a bock of rust, cant even tell there one in there!!

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