Merc 502 with blower setup questions

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08-23-2018 | 07:54 AM

Swamplizard

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From: South FL

Merc 502 with blower setup questions

What are the best setup practices for Mercruiser 502 low boost (4-5lb) blower application?

Ring gap?
Carb size and jets?
Fuel pump recommendations? (assume 1/2 inch fuel lines and pickup)
Fuel filter recommendation?
Thermostadt recommendation - FL waters - should I skip thermo?
Will stock CAM and exhaust valves work?

thanks!

Thanks

08-29-2018 | 09:04 PM

getrdunn

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Joined: Feb 2009

Posts: 8,356

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From: NW Michigan

Quote:

Originally Posted by Swamplizard

JE forged blower pistons - ring gap go by JE recommendations for your build.
blower assuminng roots 6-71 or 8-71 with dual 750's or 850's carbs.
Marine baker mechanical fuel pump 140 gph 7.5 psi / -8 hose will work but routing and restriction crucial.
fuel filter and housing wix offers very reasonable ones 1/2" inlet/outlet.
thermo/stat. Your choice but must be willing to spend some time dialing in. See recent thread.
stock cam and valves. NO