Riding lawn mower boiling hot oil, add oil cooler?

[ripcord]

Check spark plugs for signs of lean fuel mixture. that would cause high temps/overheating.


My 2¢

Too tight valves can cause higher temps, too, as the exhaut valve doesn't have long enough contact with the seat to transfer heat to the head.

 

[Snagglefoot]

Boiling water only says the oil is at or above about 212°F. That's why they specify a 40 or 50. I'm thinking they designed it right, take a sample and send it in, see if the oil is holding up. What is the recommended change interval?

I don’t think a 40 or 50 oil was ever specified for this engine. Here is the section on motor oil from the owners manual. This is just about Bitog thickie love. A 212 F oil temp is not hot for an air cooled engine, in fact it’s not even hot for a water cooled engine. Flame suit on.

 

[Snagglefoot]

I took the Mobil1 oil filter that was on there for 2 years off and cut it open. There was almost nothing in it. I stuck a FE3600 and I'll run it till it rusts.
I'll still change the oil at the end of the session and break the filter lose just so it doesn't get seized on there.

So you are the culprit who replied to your own three year old thread. It suckered me in to posting as well !

 

[oil pan 4]

I don’t think a 40 or 50 oil was ever specified for this engine. Here is the section on motor oil from the owners manual. This is just about Bitog thickie love. A 212 F oil temp is not hot for an air cooled engine, in fact it’s not even hot for a water cooled engine. Flame suit on.

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I have confirmed that the oil comes out of this engine at 260f when I change the oil when I changed the oil on one of the hotter 102f days.
It's not bitog love for thick oils. Mechanic engineers decided by the 1960s and probably by world war 2 that the oil viscosity in an engine at operating temperature needs to be around 10 to 12 cSt.
The oil operating temperature is confirmed by me to hit 260f and is likely hitting 280f, firmly putting it in 50 weight oil territory. A 30 weight oil at 260f is going to be like 7cSt.
Plus who cuts grass below freezing?