Poodlehead
Member
- Joined
- Mar 10, 2020
- Threads
- 8
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- 49
That's wild. Almost every single-cylinder Briggs explosion I've seen involved seizure of the connecting rod bearing (bushing), not the lower crank bearing.If it has the oil filter false cover it has a gerotor oil pump than is ran off the extended end of the camshaft. But unless the engine is full pressure lube then the oil pump just pumps oil from the sump into the filter and then back into the sump via the lower crankshaft bearing.. So the lower crankshaft bearing is pressure lubed on single cylinder only, But the rest of the engine is lubed with the governor gear oil slinger.
The V twins are pressure lube to all bearings.
Any small engine single or twin that has a loss of lubrication will almost always take out the rod/crank bearing first. Has to do with the rotational forces and the firing on the spark plug will overcome the oil film on the crank surface without adequate oil replenishing what is lost.That's wild. Almost every single-cylinder Briggs explosion I've seen involved seizure of the connecting rod bearing (bushing), not the lower crank bearing.