running out of ideas

dresdenfan123

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I've got a husq. with a fr600v motor. It started to give me problems a few weeks ago so in the last week (as an overhaul) I've: changed oil and filter, replaced ignition coils, changed plugs, replaced: fuel filter, air filter, carburetor, cleaned and dried gas tank. Solenoid is less than a year old. It still won't run for more than 10 minutes before cutting off and of yesterday I can't get it to start. I am relatively sure the heads not cracked. Buying a new mower isn't really an option at this point and I dread having to do my 4 acres with a 21" pusher. Any ideas?
 
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Scrubcadet10

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Occasionally valves out of adjustment can cause a problem like that. Or the gas tank might not be venting.
However, when it dies, how does it die... Do the RPM's slowly start dropping and it eventually dies out, or does it shut off like you turned the key?
 

dresdenfan123

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Occasionally valves out of adjustment can cause a problem like that. Or the gas tank might not be venting.
However, when it dies, how does it die... Do the RPM's slowly start dropping and it eventually dies out, or does it shut off like you turned the key?
It sputters out and power drops but when I turn the key to the second position it gives a last gasp of power. I am missing the vent on the top of the gas tank but I'll have that tommorrow
 

Scrubcadet10

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while your there give us the model number of the Husq, should be on a tag/sticker under the seat.
 

Bange

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dresdenfan123

Friend, I'm not a specialist and I don't even know your engine, but there are simple procedures that must be followed before exchanges.
Swapping parts at random has little chance of resolving.
Generically ...
1 - Is the battery fully charged?
No - Charge it
Yes - next step
2- Is the spark of good quality (whitish blue)?
No - check the spark plug, see excessive carbonization, electrode spacing, insulator break, coil (open or shorted) and magnet (loose or broken)
Yes - next step
3 - Is there good quality gasoline in the carburetor?
No - change the gasoline,
Yes - next step
4 - Is the engine drowning or no gas in the chamber?
No - next step
Yes - check the internal parts of the carburetor, check for blocked fuel or choke, misfit or missing screws.
5 - Does the starter run normal or slow?
Normal - next step
Slow - check the voltage at the starter inlet while turning. If 12V or so, next step. If absent or much smaller, check starter relay and / or starter coil and / or oxidation in the cable from the battery to the starter ... the same for the ground loop on the chassis and battery negative.
6 - Are the intake and exhaust valve settings correct?
No - readjust
- next step
7 - Are any belts or something weighing the engine?
No - next step
Yes - disengage the weight or loosen the belt, see the oil.
8 - Are there any strange noises on the engine?
No - next step
Yes - if you understand, open the engine and solve or take it to a mechanic shop.

Note: there are motors that lead to other analyzes, such as sensors, protection devices ... but in general the previous steps avoid unnecessary changes.
 

dresdenfan123

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this might have been the problem found it in the carb... glad I did an overhaul no idea how it got thereIMG_20210417_124257.jpg
 

Scrubcadet10

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THAT Hose clamp was in the carb!!! i bet that was holding the float closed/ almost closed.
wow... so you replaced the carburetor? did you buy it from amazon/ebay?
 
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