Robin EC25 3GP

[bigjeffyc105]

Thanks I'm going to pull the motor and put crank seals only thing I haven't done..

Thanks to everyone who has helped it's appreciated.

Originally Posted by racin161

Bad crank seals won't effect compression on a 2 cycle but will effect the fuel pump as it is mechanical and depends on engine vacuum to operate. Scotty B the pump is mounted on the engine and has it's own vacuum port in the crank case. I would look at the crank seals as the problem.
LOU

[racin161]

Post some pictures as you go along if possible which could help others.

[amesmotorsports]

electric fuel pump

[bigjeffyc105]

I tried the electric fuel pump route and it didn't appear to making it in the motor so that really confused me, and the reeds open and close with compression I think , heck I really don't know think I'm just going to pull it out and take it to someone.

[bigjeffyc105]

If I tear it down I will but at this point I'm just super confused at why it's not getting fuel into the motor and using the electric pump i making sure the carb has fuel. It's just doesn't get the fuel into the cylinder for some reason, that's why I was asking if the rings are switched around will that cause issues.

Such a simple motor causing lots of grief..

Originally Posted by racin161

Post some pictures as you go along if possible which could help others.

[bigjeffyc105]

Is there timing on these motors? Robin EC25 3pg, I mean if there is can it be so retarded it's not working correctly?

Thanks

[rib33024]

Are you sure you have the piston in the right way?

[shorty102292]

Yes there is timing. It should be set at 0°. No advance because it runs 180 out for reverse. There is a pulsar line from the back of engine on crank case should be 1/4 rubber fuel line it runs to pump check it for cracks. Check the pump for a torn diaphragm. Check stupid problems before you spend your hard earned cash. Sometimes stuff just gets overlooked we've all done it. I think at this point I would check the reeds too. These are very simple engines I've rebuilt lots of 2 strokes nothing to them. I hope you get this figured out.

[bigjeffyc105]

Originally Posted by rib33024

Are you sure you have the piston in the right way?

Piston is definitely the correct way without a doubt.

[bigjeffyc105]

Originally Posted by shorty102292

Yes there is timing. It should be set at 0°. No advance because it runs 180 out for reverse. There is a pulsar line from the back of engine on crank case should be 1/4 rubber fuel line it runs to pump check it for cracks. Check the pump for a torn diaphragm. Check stupid problems before you spend your hard earned cash. Sometimes stuff just gets overlooked we've all done it. I think at this point I would check the reeds too. These are very simple engines I've rebuilt lots of 2 strokes nothing to them. I hope you get this figured out.

Ok thanks going to check this tomorrow this thing is pissing me off..lol Need to find where the timing adjustment is too, so research time tonight..

Thanks