It can, some modules get their timing advance curve screwed up so they wont rev but still have great spark.
How old is you fuel mix?
How old is you fuel mix?
372XPW not running right
- Thread starter gregn
- Start date
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gregn
ArboristSite Member
it's 2 weeks old of 93 octane.
so have you checked spark with a good spark plug?
gregn
ArboristSite Member
yes with 2 different plugs both had spark. how do you check the ignition module to see if its bad?
What you did is all you can really do to test the module. Is the spark plug wet after you pull it from the saw??
gregn
ArboristSite Member
no. after cranking it alot i did drop a little fuel in cylinder but still would not start. some pulls it would start to hit but never start.
Well if its getting fuel, spark and compression it should run. Two last things: timing is off or compression is below 120#. Check the tightness of the flywheel nut. How long ago did the saw last run and how did it run and start? OHH how is your spark arrestor in the muffler, it should be clean...
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gregn
ArboristSite Member
I had planned on bringing it to you anyways to port it, whenever my funds become available that is. I will pull the flywheel off tomorrow and check the shear key as you stated earlier and go from there. my have to make a trip to you for this problem.
gregn
ArboristSite Member
I used it today, almost everyday. It ran fine cutting a few pieces until it decides to die as soon as I lift the throttle sometimes I can keep it running. It's been getting harder to start here lately as in used to be 2nd pull cold now on 5th pull and warm 1st pull now 3 or more pulls. I did fail to mention I checked it hot today with 90 psi if that helps any. All of them look clean (triple ported).
Well there is your problem, LOW COMPRESSION. 135 is much higher than 90 psi. that low it sounds like a scored P+C:msp_ohmy:
ndlawrence
ArboristSite Guru
Go ahead and send it to tlandrum, when you get it back it will be louder and make you feel warm and fuzzy inside!!!
Anthony_Va.
XPW Fan Club
How sure are you about the tune? Sounds like you may be running it too lean and have scored the piston/cylinder. Did you pull the muffler and look inside the P/C? I think you should do that FIRST.
gregn
ArboristSite Member
I am going to pull the muff and look inside today.
gregn
ArboristSite Member
Update....pulled the muffler off today and the exhaust side of the piston is scored, rings look real bad. The intake side of the cylinder looked fairly good though. Hopefully the cylinder is salvagable. I'm guessing this is from the saw running too lean. thanks for all the help and suggestions from everyone!!
gregn
ArboristSite Member
I kinda figured you did. Looks like I will be making a trip to meet you soon. I will pm you to see when a good time is.
