Having problems starting stihl 064

[chevyheavy56]

Hi everyone, first time poster but avid reader, I have a stihl 064 that is giving me problems, I bought the saw and it had a scored piston and cylinder and following a post here i modified the 064 so it would take the larger 066 cylinder and then i put the big bore kit from baileys on it, everything on the saw has been gone through, I had my local shop put bearings and seals in and then I cleaned and installed everything else. The first time i tried starting it it popped over for three seconds and then i have not been able to start it since. The spark seems good and so I thought it was the carb, it had a bing carb on it and they no longer make the rebuild kits for them so I found a nice walbro and installed that, with no luck so far, carb is adjusted 1 turn high and 1 turn low, I know that there is fuel in the cylinder because I can see it on the plug after pulling it a couple times, what is the next step here? Any help is much appreciated, thanks

 

[oscar4883]

Did you try changing the plug. Maybe the plug was fouled from assembly lube. Also if the diafram is stiff it could be putting out to much fuel.

 

[chevyheavy56]

yea I changed out the plug and and have cleaned the new one a couple times since, the diaphragm on the bing carb did seem stiff but the walbros one didn't and all the other gaskets seemed fine as well, the compression seems to be 135 cold, seems low to me but I guess the rings havent been broken in

 

[oscar4883]

Is the impulse line hooked up? Don't ask me how I know. LOL

 

[Dan_IN_MN]

Sounds like your flywheel key sheared. Did you degrease the crank and flywheel before you put it together? Did you torque the nut?

 

[pioneerguy600]

Sounds like your flywheel key sheared. Did you degrease the crank and flywheel before you put it together? Did you torque the nut?

You beat me to it, seen it happen all too often +++
Pioneerguy600

 

[ta2guy]

You may also want to check that the metering needle is seating proper.I've had them flood out from the tiniest buildup on the seating surface.My quick check is to hook a peice of fuel line to carb inlet and see if I can blow it.

This is the most common issue I have with small engines that have sat for awhile.

 

[rupedoggy]

What is the compression?

 

[Gypo Logger]

What is the compression?

Mike, he has 135# comp.
If it seems to be flooding, Id seat both needles and start it and let it run dry. Then adjust H&L to standard setting and try again. Sometimes this can be a quick fix.
John

 

[rupedoggy]

Yea what John said. When mix is coming out of the muffler you are flooded! Some people don't know that the first pop means turn off the choke.

 

[chevyheavy56]

Is the impulse line hooked up? Don't ask me how I know. LOL

I am pretty sure that the impulse line is good, i checked into the carb and I will double check the impulse into the crank case tomorrow, as far as the flywheel goes it is a one key type flywheel, i did not degrease it, the crank was clean when i installed the flywheel, it fit nicely into the key and i torqued it down, is it possible that the key slipped out or broke off and then the fly wheel rotated so my timing is off? It seems like I would notice that play, but that is good advice, I will also check that in the mourning. Thanks for the great tips, this is a great website, I will keep you guys posted

 

[chevyheavy56]

ok so I popped off the fly wheel and sure enough key was sheared off, I modified a key and put it in there, it fired up a couple times and in the process of trying to start it sheared off another key, when my saw shop opens tomorrow i will grab a couple better keys. This seems to be a weak point on these saws, I know they made a two key design but my saw only has one key hole on the crank shaft, has anyone confronted this? and what are the options? thanks

 

[54stude]

As manyhobies said above, it is probably a good idea to degrease the flywheel and crankshaft before assembly.

 

[rupedoggy]

Taper holds it not the key.

 

[tallfarmboy]

Taper holds it not the key.

:agree2: Make sure your flywheel nut is tightened properly, the key doesn't do anything but index the flywheel onto the crankshaft, the taper is what holds the flywheel in place.

TFB

 

[sefh3]

Make sure you clean your flywheel and crank off so this doesn't keep happening again. Grease will kill you when it's stuck in there. Clean looking saw you have there. Like mentioned, the key is there for timing only. The taper of the flywheel on the crank holds it in place.

 

[john bilsborrow]

just bought a pair of 064s but one runs in reverse the guy said. is this a crank key problem?

 

[WI_Hedgehog]

just bought a pair of 064s but one runs in reverse the guy said. is this a crank key problem?

Is the starter rope on the right way?

Maybe his idea was to use it exclusively for limbing/cutting with the top of the bar.

 

[Bob Hedgecutter]

just bought a pair of 064s but one runs in reverse the guy said. is this a crank key problem?

The one that runs in reverse will be an imported Southern Hemisphere saw.

 

[WI_Hedgehog]

The one that runs in reverse will be an imported Southern Hemisphere saw.

Those are nice to have so when one arm gets tired you can switch to the other.