HELP! 462 won’t rev up

[Stump Shot]

I don’t think so. It’s computer code *s-word I believe. Had a 572 that would start and idle like it was in the choke position on at3. Pull the throttle and it would not rev up at all, could hear the air being sucked through the carburetor, but no change in TPMs. Put a new coil on it and it ran fine

Maybe someday, someone would come up with a relatively simple to use diagnostic tool to check these type of things out, like in the automotive repair industry for example.

 

[huskihl]

Maybe someday, someone would come up with a relatively simple to use diagnostic tool to check these type of things out, like in the automotive repair industry for example.

There’s a guy in the Facebook groups looking for a MDG1 to try and reverse engineer it. Seems stupid that it’s not available to the public anyway. I guess breaking a law that isn’t enforced isn’t breaking the law

 

[pbillyi69]

this is why cpu chips shouldnt on a fuggin saw in the first place. they only serve to keep authorized repair shops being they only way to update firmware and diagnose issues

 

[Lions fan]

this is why cpu chips shouldnt on a fuggin saw in the first place. they only serve to keep authorized repair shops being they only way to update firmware and diagnose issues

Nothing to worry about, plenty of options out there if you don't like m-tronic saws.

 

[Coupe]

If you have a vacuum tester pull the tank filter out and take it off and plug a vacuum tester on
and see if it will hold pressure and if not check fuel lines and give that carb a really good clean and a new kit.
If that does not solve the problem you may have to give the coil a check to make sure it is not breaking
down.

 

[furb]

If you have a vacuum tester pull the tank filter out and take it off and plug a vacuum tester on
and see if it will hold pressure and if not check fuel lines and give that carb a really good clean and a new kit.
If that does not solve the problem you may have to give the coil a check to make sure it is not breaking
down.

Leave it hooked to the carb and pull vacuum?

 

[furb]

Carb holds vacuum through the fuel line, carb rebuilt, new air filter. Still acts the same, swapped solenoid from green to black to green again, new fuel filter. No change.

 

[cuinrearview]

I’d go Kevin’s route now. Dude ain’t sling blade but he’s just as savvy with a saw.

 

[furb]

I’d go Kevin’s route now. Dude ain’t sling blade but he’s just as savvy with a saw.

I only thought about checking the wires after it was back together. I’m going to see a guy with a pile of parts saws tomorrow and hopefully he has a smashed 462 to grab parts from. He has the 362 stuff I need he thinks but won’t check so it’s an hour long drive that’s a gamble. It almost acts like it’s limited the rpm’s and then flooding itself out.

 

[furb]

I only thought about checking the wires after it was back together. I’m going to see a guy with a pile of parts saws tomorrow and hopefully he has a smashed 462 to grab parts from. He has the 362 stuff I need he thinks but won’t check so it’s an hour long drive that’s a gamble. It almost acts like it’s limited the rpm’s and then flooding itself out.

No 462 stuff, not much 362 stuff. The business is changing hands and the stash is dwindling

 

[lehman live edge slab]

No 462 stuff, not much 362 stuff. The business is changing hands and the stash is dwindling

I’d say it’s the coil that’s giving you issues personally, controls fuel map and timing

 

[furb]

I’d say it’s the coil that’s giving you issues personally, controls fuel map and timing

I’ll order one. Got the 362 together and now that won’t run right…