Is there a small engine area on this forum? I.e. 2 strokes, weedeaters, chainsaws...etc?

Here is question for you then. Have you had one to diesel that even the Stihl trained tech couldn't repair? And BTW the unit idles normally.
 
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StarTech said:
Here is question for you then. Have you had one to diesel that even the Stihl trained tech couldn't repair Gym Equipment Australia? And BTW the unit idles normally.
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Is there a section on this forum dedicated to small engines, such as 2-stroke motors, weedeaters, chainsaws, and similar equipment? Whether you're looking for troubleshooting advice, maintenance tips, or performance upgrades, a space for discussing these machines would be incredibly useful.
 
Here is a couple forums to check out.

Arborist, Chainsaw & Tree Work Forum

Arboristsite is a forum & classifieds website for arborists, chainsaws, tree worker and firewood processing. Forums for all aspects of tree work, chainsaws and tree equipment. Classifieds for chainsaws & arbor tree equipment.
www.arboristsite.com www.arboristsite.com

Outdoor Power Equipment Forum

Outdoor Power Equipment forum for small engine mechanics, tool and equipment stores, and repair shops.
opeforum.com opeforum.com
 
StarTech said:
Here is question for you then. Have you had one to diesel that even the Stihl trained tech couldn't repair? And BTW the unit idles normally.
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Here is another couple pieces of info. When running at excess full throttle, the tach shows no spark (ie show the unit is not running but it is) but at idle there is spark as there is normal tach readings.

Stihl HS56Z Hedger under warranty at the time which is why I took it to the dealer for repairs which couldn't find the problem. The tech didn't even know how to do a pressure/vac test.

Tiger for you the question is what would cause no spark at full throttle but yet the hedger is running away? I do know the answer to this and what the root cause was as I repaired the hedger myself.

And this one that I just repaired last week. Echo PAS-225 that would only run at 6000 rpms at full throttle. No problems with compression, spark, or fuel delivery, just would not accel to 7600-8700 rpms even with only the 375 head and no string. Now it is at 8600 with a 450 head and normal string length. BTW no spark arrester present.
 
StarTech said:
Here is another couple pieces of info. When running at excess full throttle, the tach shows no spark (ie show the unit is not running but it is) but at idle there is spark as there is normal tach readings.

Stihl HS56Z Hedger under warranty at the time which is why I took it to the dealer for repairs which couldn't find the problem. The tech didn't even know how to do a pressure/vac test.

Tiger for you the question is what would cause no spark at full throttle but yet the hedger is running away? I do know the answer to this and what the root cause was as I repaired the hedger myself.

And this one that I just repaired last week. Echo PAS-225 that would only run at 6000 rpms at full throttle. No problems with compression, spark, or fuel delivery, just would not accel to 7600-8700 rpms even with only the 375 head and no string. Now it is at 8600 with a 450 head and normal string length. BTW no spark arrester present.
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Two possible causes would be an ignition coil that is slowly failing, and running Tru Fuel instead of pre-mix fuel.
 
Running standard oil/fuel mix. I know the customer was using my Pro oil packets; therefore mixing the fuel on as needed basis for all of their Stihl and Echo equipment and I was the same mixture myself.

And coil was working as designed. Cutting ignition spark at 9300-9500 rpm. IE speed limiter activating at 9300-9500 rpm.

Neither was the cause of the problem. Keep thinking as it was definitely dieseling. Definitely was running well above 9500 rpm with no electrical spark.
 
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