Author Topic: husqvarna k750 cut off  (Read 338 times)

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Offline fixet

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husqvarna k750 cut off
« on: April 29, 2016, 04:01:41 pm »
my husqvarna k 750 is dies During Cut Concrete it the blade During Cut Concrete enters 2 cm and the blade stop the Bearing right i changed the clutch and the coil and the cylindr and the piston and i made a hole in the exhaust and no usless and i changed the plug and i changed the carb and i opend the gas cap and i changed the gas filter and the air filtet and i face the same problem

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Offline 3000 FPS

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Re: husqvarna k750 cut off
« Reply #1 on: May 04, 2016, 09:38:38 pm »
Pull the muffler off of it and take a look at the piston and cylinder.     See if there is any scoring on the piston.   
Sounds like you have changed everything that I can think of to cause your problem.
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Offline 630 red

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Re: husqvarna k750 cut off
« Reply #2 on: July 31, 2016, 03:50:22 pm »
one of them past through our workshop with same problem a few years ago ,i think it had a hair line crack in crankcase our lad said that worked on it

Offline 3000 FPS

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Re: husqvarna k750 cut off
« Reply #3 on: July 31, 2016, 06:51:47 pm »
one of them past through our workshop with same problem a few years ago ,i think it had a hair line crack in crankcase our lad said that worked on it

Only way to tell would be to pressure test it.    Maybe even then if it had a hairline crack it might not show up until it got hot.
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Offline oldpro

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Re: husqvarna k750 cut off
« Reply #4 on: November 07, 2016, 05:46:56 pm »
On cutoff saws it is absolutely critical that the air filter seals 100% perfectly,if the motor ingests any concrete dust ot metal dust the cylinder and piston will wear out extremely quickly. On cutoff saws check the piston intake skirt(pull off the carb and look with a light) if you see any scratches at all pull off the cylinder and check the nikasil plating below the intake port,it can be worn away to the aluminum. Ingesting abrasive particles is what kills most cutoff saws.
All sealing surfaces of the air filters should be sealed with a thick heavy grease like wheel bearing grease.
Like the other guys said,if it's quitting when hot it could be the ignition or a bad tank vent. Just replace the vent to eliminate that possibility. Also when it quits immediately check it for spark.
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