038 Mag wants to rip my arm off!

[Okie294life]

I’m working to rebuild an 038 mag stihl, I put a new recoil kit in it and now when I try to start it I get backfire that seems to want to rip my arm off every time I pull the cord. What am I doing wrong?

 

[president]

I’m working to rebuild an 038 mag stihl, I put a new recoil kit in it and now when I try to start it I get backfire that seems to want to rip my arm off every time I pull the cord. What am I doing wrong?

check the flywheel key.It may have moved loose and timming is some advanced

 

[Okie294life]

check the flywheel key.It may have moved loose and timming is some advanced

Good idea checked it and replaced key, same deal. Is there a way to retard the timing or it possibly be a coil issue?

 

[s sidewall]

Key tight on crank and flywheel or does it have play?

Steve

 

[Okie294life]

Key tight on crank and flywheel or does it have play?

Steve

No it’s good. I was reading somewhere about connecting rod bearings having play and routing out holes in the coil to retard timing. Could it be

 

[L34]

You said "rebuild",has it got the correct coil/wheel combo?
Did it run before?

 

[Daniel Haglund]

Like @L34 said, this sounds like a coil/flywheel mismatch. The timing may be too much advanced. If that is the case you can try to retard the timing by removing the flywheel key and rotate the flywheel just a little bit.

 

[HarleyT]

Tell us about the saw and what you have done.

 

[Okie294life]

You said "rebuild",has it got the correct coil/wheel combo?
Did it run before?

I put a new piston/seals, and rubber, and rebuilt the recoil. No idea if it ran before.

 

[HarleyT]

OEM piston? Aftermarket? Or one that is just the same diameter?

 

[Okie294life]

OEM piston? Aftermarket? Or one that is just the same diameter?

It’s a tecomec, supposed to be the one the fits the saw.

 

[HarleyT]

Does it give you the oem part number it replaces?

 

[HarleyT]

Or can you put up the online link to it?

 

[Okie294life]

Does it give you the oem part number it replaces?

1119 030 2002, and I second guessed myself and pulled the piston. It’s dead nuts on with the OE piston.

 

[HarleyT]

Gasket?
Is it the same?

 

[brandonstc6]

I had a 044 with the same problem. I swapped out the flywheel for a different one and that fixed the problem.


Sent from my iPhone using Tapatalk

 

[Okie294life]

Gasket?
Is it the same?

Harley T you are the man. I was reading one of your other posts, the SOB was hydrolocked with tons of penetrating oil in the crankcase. I turned it upside down cranked the piss out it, put the plug back in and rip.....magic. She won’t stay running but hey it’s a start, she sounds hella sweet though....a little shot of choke cleaner or a kit and she should idle. I bet this thing will pull like a freight train once it’s tuned up.

 

[HarleyT]

That's what the guys on cell block C said about me!!

I bet this thing will pull like a freight train once it’s tuned up