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Post by muddog on Sept 28, 2015 11:27:10 GMT -5
The last time this blower ran was for about 5-10 minutes then slowly powered down and cut off and has not started since. So far, I have cleaned the carb, fresh fuel mixture, new plug, new ignition module (was not getting fire at one time), haven't been able to check the compression yet with tester (just thumb over hole so I can feel some compression but obviously don't know how much). Now I'm pretty much stuck on what to do next. Could have bought a new one (same model) at local big box store for $80 and been done with it Any suggestions?
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Post by Supercharged86 on Oct 1, 2015 19:11:57 GMT -5
Compression test is key. You can have all the fuel and spark necessary but without at least 100 psi compression (and even that isn't good, but should fire) you'll be just spinning your wheels. Also be sure you have the right gap settings on the coil and plug. If you don't have an ignition tester that tests for spark with the plug in, then take an old plug like a CJ8 and remove the electrode. Now with the plug out and grounded to the head, spin the motor over and see if the spark will jump to the outer case. This will confirm if your coil is strong enough to fire under compression. Even if you have carburetor problems, a little mix down the plug hole with everything else in check should yield you a "fart" or two. Also check the exhaust port behind the muffler to be sure it's clear. Many times two cycle equipment doesn't run or run well due to a plugged up exhaust port. If it can't breath it can't run. Good luck and check back with us. Steve
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Post by muddog on Oct 2, 2015 13:15:11 GMT -5
Thanks for the info Steve. Nephew supposed to be bringing me a compression tester this evening. Had done a 'contact us' on the Homelite web site and was advised that compression should be 95-150. Ignition tested showed spark. If not enough compression, then I guess it's off to the big box store for purchase.
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Post by Supercharged86 on Oct 2, 2015 16:22:10 GMT -5
Sometimes you can also have low compression due to a "stuck" ring, without any other damage. I've had several saws that didn't fire due to low compression but didn't show any signs of damage. After pulling the head, I found that the ring or rings were stuck in the lands from carbon build up. After freeing them up and cleaning the ring and lands, the compression came right back and she was off and running. So if your compression test comes up lame and there's no sign of damage (ie. scoring), I'd check for a stuck ring before totally giving up on it. Steve
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Post by muddog on Oct 3, 2015 10:46:06 GMT -5
Compression test only yielded 65. I had seen a video on youtube, same model, same problem. The guy finally worked his way to a stuck ring also. He poured ATF down the plug hole and let it sit for 24 hours. Only later after he destroyed the blower did he find out that the ATF had worked. Don't know if it will but might give it a try before moving on. Thanks for the info Steve.
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Post by Supercharged86 on Oct 18, 2015 9:37:54 GMT -5
Glad I could help, Yeah, 65psi will never fire. Glad you found the problem though. 50/50 mix of ATF and Acetone makes the best penetrating oil for rusted nuts/bolts etc. Stinks bad though. This can free up the stuck ring but will not clean the carbon out of the lands, so the problem will likely come back. These are very simple motors, removing the head is a piece of cake. Finding a long T-27 torx bit to fit the head bolts, that these motors often have is the most challenging part of the whole job. Good luck. Cheers. Steve
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