Neighbors Troy Bilt Pony cranks slow then kicks back, think its the ACR?

[slomo]

Fires on starting fluid for half a sec then dies.

What does this tell you? Engine needs air, fuel, spark (at the correct time) and compression to run. She is thirsty........

Stuck on ACR I see. Ignored the fueling deficiency above.

Take some 2 stroke mix. Spray directly into the carb inlet. See how long she will run WHILE spraying 2 stroke mix. Throw the Ether in the trash.

 

[sgkent]

the high compression could be a bad compression release. But if you can pull it over with the rope, or the starter crank it, it should fire even easier with the higher compression. If you are chasing a hard to pull engine then yes, ACR may be the issue. But if you are pulling and pulling, and cranking to no avail, that is not the ACR unless the engine is spinning so slow you are barely turning it over. Even then it if you get any spark and fuel ignition at all it should take off.

 

[Tiger Small Engine]

With 145psi in a Briggs, sounds to me she is all carboned up internally. Yours and every other engine manual out there states to de-carbon the engine say like every 5-7 years.

Your other tests look good to me. 10.8 volts cranking is good.

Most people never even have the valves adjusted in many small engines. Probably the only time an engine gets the carbon cleaned internally is when a cylinder head gasket is being replaced, for example.