Picked up this ms150tc, its slow to rev up no matter what.. (NOW FIXED)

[Mastermind]

Fattening up the low side helps with off idle bogginess.....tough to fix this stuff over the internet.

Personally, I open the muffler, and advance the timing......then tune.

Tune is tricky on that model.

 

[bikemike]

Adam's issue looks to be one of pick-up from idle, but surely timing advance will only pay dividends at the higher end of the rev scale?

No I think they pep at at low rpm with the advanced timing and have better throttle response across the bord. The muffler mod seems to bring up the power band and seems to help with fuel efficiency imo on the 150t vs the 2 stock saws we have at work

 

[MattG]

No I think they pep at at low rpm with the advanced timing and have better throttle response across the bord. The muffler mod seems to bring up the power band and seems to help with fuel efficiency imo on the 150t vs the 2 stock saws we have at work

Fair enough....well hopefully we'll get Adam's lil saw running as sh!t hot as yours in that clip you posted!

 

[Adamski]

OK so I took the flywheel off, filed approx 1/3rd off the keyway. Took the muffler off. This saw had been running very rich. A lot of carbon choking that little hole up even more than it should be. I have opened the slot up about 3 times what it was. There was no spark screen. All back and running. No video today but it picks up nicely now. Fattened up the low jet, opened the high jet to Max with the restrictions still in place on the high screw. This time it makes a difference with the timing advance and muffler mod. Well it will cut the length of the bar now (10") which is superb progress. It's cutting nice. I'll try and get a video tomorrow. It is 10x better than it was.

 

[Adamski]

Chain is also too tight to

Chain was as loose as it could get without it hanging off the bar

 

[MattG]

OK so I took the flywheel off, filed approx 1/3rd off the keyway. Took the muffler off. This saw had been running very rich. A lot of carbon choking that little hole up even more than it should be. I have opened the slot up about 3 times what it was. There was no spark screen. All back and running. No video today but it picks up nicely now. Fattened up the low jet, opened the high jet to Max with the restrictions still in place on the high screw. This time it makes a difference with the timing advance and mod. Well it will cut the length of the bar now (10") which is superb progress. It's cutting nice. I'll try and get a video tomorrow. It is 10x better than it was.

We'll turn you into a TH junkie yet!

 

[bikemike]

We'll turn you into a TH junkie yet!

Me too il get there one day lol

 

[pro94lt]

Chain is also too tight to

Chain is also too tight to

This!!!

 

[Adamski]

This!!!

It wasn't, it isn't. Any looser and it would have hung off the bar. I do check the obvious. Muffler mod and timing advance seem to have fixed the bogging.

 

[bikemike]

So I have this little pip squeak of a saw as of today. Starts up fine, has been slow to rev up though. Tried richening up the L screw but it has limiters. Trimmed the limiter and richened it up some more. Still no joy. It's fine when up and running but I thought this little thing would be more snappy on the throttle from idle. I have cleaned the carb, checked the fuel hose and filter. Any ideas???

Did you get ur saw new or used?

 

[Adamski]

oh god, 100% used. think it would be approx $115 if my maths is correct. Runs nice now! Think it is quite tidy for that price.

 

[MattG]

oh god, 100% used. think it would be approx $115 if my maths is correct. Runs nice now! Think it is quite tidy for that price.View attachment 72021 View attachment 72022

Certainly looks very clean.

 

[bikemike]

oh god, 100% used. think it would be approx $115 if my maths is correct. Runs nice now! Think it is quite tidy for that price.View attachment 72021 View attachment 72022

Your lucky I could not find 1 used in Mn anywhere

 

[Adamski]

Your lucky I could not find 1 used in Mn anywhere

Over here in the UK the world is your Oyster.... sometimes..

 

[bikemike]

Over here in the UK the world is your Oyster.... sometimes..

Well you found a pearl in your oyster worth more than you paid

 

[MattG]

Yeah that Lil guy is running like a stock 150t. IL post a vid of others that were modded and you se a difference in them

Just wondered do these saws come with a rev-limited coil?

 

[Adamski]

I think so. I have read that they are a bugger to tune as they sound like they are 4 stroking when they are just hitting the limiter. I tuned mine to clean up in the cut. Although I think it is a tad rich still as it cleans up in wood around 2" plus..

 

[MattG]

I think so. I have read that they are a bugger to tune as they sound like they are 4 stroking when they are just hitting the limiter. I tuned mine to clean up in the cut. Although I think it is a tad rich still as it cleans up in wood around 2" plus..

Yeah the clip of Mikes sounds like it's hitting something when he's got no load.

 

[bikemike]

Just wondered do these saws come with a rev-limited coil?

Yes they do have a limited coil

 

[bikemike]

I hate the rev limited coil I'm most saws. But they need to dummy proof engines cause some of us like to piss rev like the oh26