Reply To: Oil recovery to pressure tank 1957 evinrude 35

[jdunham]

Thanks Crosbyman. I think you misunderstood my question a little bit. I will try to restate it differently.
The reeds in the crank case drain in theory are there to do the same job as the little check valve in the reed box. venting the crank case out on each stroke but not letting them vent back in.
They are of different construction and may not seal as well (metal vs rubber). They were not required to resist more than the vacuum of the crank case.

My thought was to install a nipple on the drain cover and plug the drain into the exhaust tube (standard oil recovery mod). Then use the new “pressure” nipple on the drain cover as the pressure source for my dual line tank. I would cap off the original pressure nipple from the reed box.

The unknowns for me are as follows:
Will inadequate drainage, if caused by back pressure, damage anything or just make it run rich? I do not have a good sense of whether or not there will be enough “flow” to keep fluid from building up.
Do the drain reeds seal well enough to maintain tank pressure? Do they seal well enough to maintain tank pressure but leak back into crank case and mess with the fuel/air mix ratio?

If there is no risk of permanent damage I am game to try this. For now I will do the separate collection vessel with a vent line up to the air silencer.

I hope this makes my thought more clear.