on the yamaha, i've recut the head deck to even it up, number 3 allways comes up a bit short, was thinkin cuzz of the injector pump space the hole did not charge as well like 1 and 2.
on the yamaha, i've recut the head deck to even it up, number 3 allways comes up a bit short, was thinkin cuzz of the injector pump space the hole did not charge as well like 1 and 2.
Part one of "Secrets of the OMC Mod 50" : http://www.boatracingfacts.com/forums/showthread.php?t=2052
Fred
If you burn a piston in the Yam which one goes first?
OK you OMC triple buffs, I've got an extra Mod-50 flywheel available for sale. Anyone interested send a message.
Tim
TroyWoodF1 liked this post
Tim
Is that the same as a M31 flexplate?
How many different race flywheels was there for the 49 ci?
Thanks
Powerabout
number one allways burnt down on me, i was allways pushin timin.
only one 3 cyl race flywheel, the mod50 flex wheel.
Part one of "Secrets of the OMC Mod 50" : http://www.boatracingfacts.com/forums/showthread.php?t=2052TroyWoodF1 liked this post
Where do you get the long rod with the larger size small end?
and
Anyone know what the merc rod used was?
and
Best option for new pistons
I am trying to find out what you can build with new parts and what you need to scrounge
thanks
Sea-way gots mod50 rods.
Sea-way or McDaniel on pistons, two ring pistons last longer.
? not sure what rods, and or if it worked.
Part one of "Secrets of the OMC Mod 50" : http://www.boatracingfacts.com/forums/showthread.php?t=2052
Thanks Fred
In a previous post you posted a port map suited to tunnel or hydro's saying that it was a bit high for a V bottom.
Was that map for the short or long rod set up?
Regards
Powerabout
OMC 49cuber intake ports are in a high state of tune, for the most part it's finger ports on the intake side.
the map is the same for ether rod. my tunnel is DEEP, not much help from the air
to get on plain, she pulls the hull right on plain, witch is like two Vee hulls.
you can get what ever you need, even a new 31m
Part one of "Secrets of the OMC Mod 50" : http://www.boatracingfacts.com/forums/showthread.php?t=2052
Here's a few bits of data
Do we assume all 75's have raised and chamfered exhaust ports and bigger carbs?
Enjoy
Powerabout
Rev 2 added inner exh plate
Last edited by Powerabout; 04-28-2009 at 12:28 AM. Reason: supdated spreadsheet
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