Rebuilt Engine Issues

devadasy

Robin Engine
Model: EC25-2PG
Disp: 244cc
Motor No: 83-08185

Engine will not run unless you hold the choke a little. The engine does not throttle up much it has had the oil system removed and is using a premix. 35:1 is mix atm for break in. Compression is at 125 lbs. I dont know if it is a carb, Fuel pump, timing or a gas mix issue.

The motor had had the following parts replaced

Crankshaft
cylinder
Piston
Piston Rings
Crankshaft Seals
Crankshaft Bearings
Spark Plug
Carb Gaskets
Reed Gaskets
Cylinder Gasket
Head Gasket
Fuel Pump Gasket
Fuel Lines
Fuel Filter
Starter Belt
Exhaust gasket

BGW

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Heliarc

Ok, for your fuel pump, remove the line from the pump outlet going to the carburetor.Then crank the engine.You should have a good spurt about 6"-12" high, consistently pulsing out in time with the engine rotation.That's the easiest test.

35:1 is pretty thick for a even break in.I'd go 50:1 and I'm sure someone can back me on this.It's what I used when I rebuilt mine.A few tanks later and now I run at 100:1, which is a bit thick.

I am thinking carb issues, but do the fuel pump and let's see what you get.