Briggs & Stratton OHV Plastic Engine No Compression

[nbpt100]

If you are not set up or have the experience in trouble shooting and solving the engine problems then a repower with a used engine might be sensible if the deck is in good condition. As a self described flipper you must come across beat looking mowers with working engines.

 

[slomo]

If you are not set up or have the experience in trouble shooting and solving the engine problems then a repower with a used engine might be sensible if the deck is in good condition. As a self described flipper you must come across beat looking mowers with working engines.

If he tore it all down as we see in the pics then he is capable of reaming a valve guide and tossing on a head gasket.

 

[nbpt100]

If he tore it all down as we see in the pics then he is capable of reaming a valve guide and tossing on a head gasket.

I am going by what he said.

 

[slomo]

I am going by what he said.

Remember to lap the head and block where the head gasket sits. 220, 400 then 800 grit wet/dry paper on the garage door window. Let the paper do all the work. Spray on some Permatex hi-tack gasket spray on the head gasket. Torque bolts in 3 steps. Should be good. Recheck the torque after a couple mows.

 

[RevB]

From the looks of the intake valve and cylinder walls, there is a high amount of dirt ingestion causing excessive wear The intake valve covered in burnt oil suggest that it is pulling in oil from the breather and burning it. The intake valve seat and valve face are showing wear which could result in the valve not seating properly and therefore not sealing against the seat. The exhaust valve looks to be sitting too high in the seat with uneven valve face to seat contact area, which could indicate either the exhaust valve is bent or the seat isn't sitting flush with the valve.

Exactly.

 

[RevB]

Cylinder is scored, valves need to be ground or at least lapped, probably need to replace rings. May be time to chuck it and get another engine.

Lapping just makes the seat and valve shiney.

 

[Gord Baker]

The Bore looks to be in very good condition. Be sure Valve Guide clearance is adequate. What gauge were you using to check compression. There must have been some! Carefully reassemble, Torque Gaskets and set valves per spec. It should run fine unless there is a camshaft problem. Be sure valves are opening and closing as they should.

 

[RevB]

Thank you sir this is what I was thinking as well not worth the time, energy and effort to fix when you do not have the parts of correct tools for the job. I agree with you just part out what I can and scrap.

You ought to watch some YouTube videos of Pakistanis rebuilding engines.

 

[hlw49]

To check to see if the valves are seating properly put the spark plug back in and pour some liquid in the head and see if they seal

 

[RevB]

To check to see if the valves are seating properly put the spark plug back in and pour some liquid in the head and see if they seal

I would pay to watch him do that....