Posted by 36F30 on July 17, 2011 at 07:57:34 from (71.214.211.46):
In Reply to: Overhauled F-20 posted by Tom Fleming on July 16, 2011 at 19:20:49:
I will explain it to you from my perspective. These are not true splash lubed like a briggs and stratton lawnmower engine, they are a combination type that splashes PUMPED oil. The only part of the crank in these engines that splashes oil is the dipper on the rod cap, the only place they touch oil is in the dipper trays, if the trays are not being replenished no oil is getting splashed. The crank and its bearings are above the oil, if you don't believe that take your hand hole cover off and look. Oil is pumped to the dipper trays and then to the front of the engine where a small tube oils the gear on the front of the crank, this oil flows back to the pan through the front bearing. the rest of the oil travels up to the filter and then one tube goes to lube the governor bushing, Starving the gov. bushing for minutes is bad, they are a notorious weak/ wear point the other tube returns to the block at the lower rear. The cam and rear main are lubed by splash caught in cast in trays in the block.
I have an F20 block here that was not cleaned well during its overhaul, a piece of debris plugged the number two oil orifice for its dipper tray. The motor had good oil pressure but even with all that oil being flung around the rod seized and broke with the piston exiting out the left side of the block. The guy paid $1500 dollars for his overhaul and I gave him $50 for what was left of his investment.
I do all my own engine work and it is my opinion that if you don't have pressure on that gage in 10 seconds or less you are doing damage to your motor. That is unacceptable to me and I could not tell others anything different.
We are both trying to save these old girls so I will respectfully agree to disagree with you
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