Fast Fred's OMC Mod 50 secrets Thread #2

**Tim Kurcz** · 06-05-2010

From the sounds of it you've got too much fuel pressure. At some point preessure will overcome the inlet needles and flood the engine as you have noted. That high delivery pump is way over-kill as the Mod-50 engine will burn about 12GPH at full power. Suggest a smaller pump to save energy and regulate pressure to 3-1/2 PSI. I use the Mr. Gasket in-line 32 GPM and regulator it only draws 2Amps..........

Tim

**Fast Fred** · 06-06-2010

this sound like it ( it bein the pump) Mr. Gasket Part No. 12S Specs: 4-7 PSI, 35 GPH.

**sheuninck** · 06-06-2010

Originally Posted by Tim Kurcz

From the sounds of it you've got too much fuel pressure. At some point preessure will overcome the inlet needles and flood the engine as you have noted. That high delivery pump is way over-kill as the Mod-50 engine will burn about 12GPH at full power. Suggest a smaller pump to save energy and regulate pressure to 3-1/2 PSI. I use the Mr. Gasket in-line 32 GPM and regulator it only draws 2Amps..........

Tim

is this the regulator you use in the picture?

**Tim Kurcz** · 06-06-2010

Yep Fred, that is the correct pump and regulator. Set pressure no lower than 3-1/2 and no more than 5 and you should be fine. Be sure to glance at your pressure guage at top to be certain you're still getting 3-1/2. If not, use a smaller restrictor on the return line. Good luck!

Tim

**thornl01** · 06-09-2010

Yo Fast Fred !

The post you had a while back on adding fingerports to a 49 er, wa supposed to have pictures but did not.

What is the chance of getting these reposted.

Please.

LT

**Tim Kurcz** · 06-09-2010

Do you mean like these?

**thornl01** · 06-10-2010

YES

Thanks

LT

**Fast Fred** · 06-15-2010

nice lookin finger ports,
hey Tim i set that system up with a hand made .060 restrictor jet, with that style regulator i only got a 1/2 #psi with the reg on max 5.5 psi, so i put in a 43D jet and with the reg maxed i got 3psi.. with the pump off, clampin on the return line i get a stiff ball, so i know the needles and seats are AOK, so should i keep goin down in restrictor jet size till the reg is within a 1/2psi of it's readin? ( so like when it's set on 4psi she's readin 3 1/2psi) thinkin a 38d jet would do it, but thats way smaller than said so i'm checkin in.
thanks
FF