husky 435 bogs when I try to rev it

[GRT Ranch adventures]

hey everyone,

I picked up a little husky 435 for $10 at an auction, it will start and idles ok but every time I hit the trigger it bogs down and wont spin up the chain. my first thought was a clogged fuel or air filter so I replaced both, same problem. next I pulled the muffler off and it was in perfect shape and the screen is clean, so as far as I can tell its breathing ok. next I figured it had to be carb trouble of something with the spark so I put a new plug on it and replaced the carb with an oem husky carb, not a china one, and still have the same problem. so at this point I'm not sure what else it could be, any ideas on what to check next

thanks,
Garrett

 

[lone wolf]

hey everyone,

I picked up a little husky 435 for $10 at an auction, it will start and idles ok but every time I hit the trigger it bogs down and wont spin up the chain. my first thought was a clogged fuel or air filter so I replaced both, same problem. next I pulled the muffler off and it was in perfect shape and the screen is clean, so as far as I can tell its breathing ok. next I figured it had to be carb trouble of something with the spark so I put a new plug on it and replaced the carb with an oem husky carb, not a china one, and still have the same problem. so at this point I'm not sure what else it could be, any ideas on what to check next

thanks,
Garrett

Won't spin the chain at all like its jammed?
Fuel line soft and collapsing,replace.
Check the compression and post the numbers.

 

[GRT Ranch adventures]

the chain is free and the fuel line looks ok from the outside but i guess it could be collapsing its an auction find so i have no history on it as far as what fuel was ran in through it, maybe the previous guy ran ethanol. ill get the compression numbers when i get home, what should they be?

 

[lone wolf]

the chain is free and the fuel line looks ok from the outside but i guess it could be collapsing its an auction find so i have no history on it as far as what fuel was ran in through it, maybe the previous guy ran ethanol. ill get the compression numbers when i get home, what should they be?

Does the line feel spongy when squeezed?
Keep pulling the comp tester till it stops rising no matter how many pulls about 15, maybe it should be150 I suppose. We will see.

 

[GRT Ranch adventures]

i did not notice the fuel line feeling bad but ill double check tonight

 

[rupedoggy]

Adjust the low speed needle counter clock wise. It is to lean to throttle up. Mike

 

[GRT Ranch adventures]

Adjust the low speed needle counter clock wise. It is to lean to throttle up. Mike

adjusting the carb changes the idle but makes no difference when i pull the trigger

 

[irhunter]

adjusting the carb changes the idle but makes no difference when i pull the trigger

Have you adjusted the carb high and low screws to factory settings?

 

[GRT Ranch adventures]

i tried adjusting the carb that came with it and im pretty sure i had it to the factory settings, since i replaced it i have tried adjusting both needles a little bit but saw no change so i put them back to where they started when it was delivered. i assume that it is at factory settings since its a brand new husky carb. it idles a bit rough but it will stay running. when i pull the trigger it sounds like the chain brake is on but its not and the chain moves freely.

i have a video of it running ill put on youtube and link here when its up

 

[mountainlake]

Chech the compression, it could be wore out. Steve

 

[GRT Ranch adventures]

Well just put a compression tester on it and after about 20 pulls it was showing about 32 psi so I guess I'll be ordering a piston kit for it. There was no visible scoring looking through the exhaust port, y'all reckon I could just do the piston or should I order the cylinder as well?

 

[mountainlake]

Most cylinders dont wear at all if there nicalsil or chrome so just a piston and rings. Steve

 

[Wood Doctor]

At 32 psi compression, I do not see how it started and ran at all. Are you sure the reading was not actually 132 psi? I suggest that you double check that measurement. Just MHO.

 

[lone wolf]

Well just put a compression tester on it and after about 20 pulls it was showing about 32 psi so I guess I'll be ordering a piston kit for it. There was no visible scoring looking through the exhaust port, y'all reckon I could just do the piston or should I order the cylinder as well?

There's your dinner! But cross-check that gauge against a known runner first. Then we can go from there.

 

[GRT Ranch adventures]

Well I already tore the 435 down but I checked the gauge on my 350 and it only showed 50 psi...

There's your dinner! But cross-check that gauge against a known runner first. Then we can go from there.

Here's some pics of the inside of the 435

 

[lone wolf]

Well I already tore the 435 down but I checked the gauge on my 350 and it only showed 50 psi...

Here's some pics of the inside of the 435

YUP! How's the fuel line spongy?

 

[GRT Ranch adventures]

Hmmm pics didn't work let's try again

 

[GRT Ranch adventures]

YUP! How's the fuel line spongy?

No the fuel line feels fine to me

 

[GRT Ranch adventures]

The piston looks good to my eye you can still see the lathe tooling marks on most of it. Is it normal to see that much carbon below the ring? Also the only engine I've ever got into that only has one ring.

 

[GRT Ranch adventures]

Here's the video of how it was running