wanted to run twin vacuum pumps on an OMC, wanted to know how everyone runs theres,
do thay run two pumps on the same cyl, or should i make an other vac barb on another cyl so each pump pulses on its own cyl.
thanks
FF
wanted to run twin vacuum pumps on an OMC, wanted to know how everyone runs theres,
do thay run two pumps on the same cyl, or should i make an other vac barb on another cyl so each pump pulses on its own cyl.
thanks
FF
Part one of "Secrets of the OMC Mod 50" : http://www.boatracingfacts.com/forums/showthread.php?t=2052
definately one pump per cylinder
ya was thinkin that, all factory pumps are set that way, thanks, anybody gots any pic?
Part one of "Secrets of the OMC Mod 50" : http://www.boatracingfacts.com/forums/showthread.php?t=2052
and run the fuel flow in series
This engine uses 2 fuel pumps, one was for bring fuel from the fuel supply, the other to deliver fuel to carbs via the oil mixing unit.
Maybe J. Nerstrom will chime in on this.
Brent 17W
so drilled in on number two intake on the linkage side, ( theres a threaded boss for a dashpot, used the hole closest to the crank). so not side by side? was thinkin fuel line in to a Y fittin then into the pumps, then from one pump to a Tee between the top and the center carbs, pump two Tees in between the center carb and the lowest carb. lookin for volume to the carbs, seen this set up on a V6
Part one of "Secrets of the OMC Mod 50" : http://www.boatracingfacts.com/forums/showthread.php?t=2052
Hey Fred,
There are two set-ups you can use.
1) The puller & pusher pump set from an OMC 30 or 35 HP triple work well. These are piped in series to the fuel manifold. Or,
2) Two standard pusher pumps piped into a common fuel manifold one from each end.
In both cases pumps are run individually from different cylinders. I've used these systems for race boats with electrics deleted for weight savings.
Good luck,
Tim
finger ported, solid molded, SST60, i'm going with one on each end of the manifold.
Part one of "Secrets of the OMC Mod 50" : http://www.boatracingfacts.com/forums/showthread.php?t=2052
a cross flow big bore to 8300..wow!
and about 10gph so less then 10lbs/hr
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