Fast Fred's OMC Mod 50 secrets Thread #2

[Tim Kurcz]

For all of you Mod-50 fanciers... I loaned Phil McDaniel a brand new sleeve for duplication. Contact him for replacements.

Tim

[Fast Fred]

ya thinkin i'll do somethin with that case

[Fast Fred]

got that fuel system hooked up, what size drill bit, 1/16th, for the return line jet? gettin some pics

[sheuninck]

Hi Fred,

Take a look at the attached schematic and you might consider doing a little more plumbing work. The engine looks like fun tiller style!

Tim

Tim,
i get the filter, pump regulator, gauge, carbs, but I cannot read what is printed in the box just after the carbs. Can you reply with this.

[Fast Fred]

it says (.060 orifice), theres a .060 jet in the return line. it forces the fuel to the carb side, i made that setup in the schematic, tapped out the return line elbow
for a 5/16ths set screw, drilled the set screw with a 1/16th drill bit. got pics but not till sunday

[sheuninck]

thanks fred. do you think a holly red 5 psi fuel pump work on this setup?

[Fast Fred]

thinkin 3 psi for the 1 bbl carbs, Holly makes a 1-5psi regulator, just and it in line after the pump.

[850cc racer]

I run two jets as on the return side i have the choke line going off it.
A 52 jet after the carbs.. 60 at the T where the choke comes off to get flow to the choke.
I run a the holley reg too. 3.5 psi is where its at.

[850cc racer]

so ive added a pyro meter in the exhaust meg right at the top.

any ideas on exhaust temp should be?

[Fast Fred]

i got 985 deg f, at 8000rpms