ms 150tc Modz

SixGun · Jan 22, 2016

Doing this saw for Baja Mike, wanted to post a few pics of what I do. I am not in any way trying to step on any toes. Pics for information purposes only. Lots of guys asking me questions, here you go.

SixGun · Jan 22, 2016

SixGun · Jan 22, 2016

Exhaust outlet before and after. Did my best with the pics so I hope you can see whats going on. Stock outlet hole is tiny, so we open it as big as possable

SixGun · Jan 22, 2016

Drill out tiny steel pin that limits High adjustment

SixGun · Jan 22, 2016

Shave bump off of plastic limiter on Low adjustment. I used a razor blade

SixGun · Jan 22, 2016

Before and after cutting flywheel key with a micro file.
Be sure to file on the Right hand side of key with key on bottom when looking at face of flywheel. The goal here is to create spark faster in the rotation . flywheel is set back on crankshaft and rotated Counter clockwise against your cut key and tightened. I cut about 1/3 from the key

SixGun · Jan 22, 2016

Whenever modding a muffler be sure that carb is enriched to compensate for extra air flow. I do most of my tuning on these little saws by ear while making test cuts. There are other videos posted of this saw modded so I won't post any.
Gains were very impressive, timed test cuts came in over 20% faster than stock.
Awesome little saw

monkeylove · Jan 22, 2016

Great details and pics. Thanks for taking the time to detail that mod.

arboristdean1130 · Jan 23, 2016

Hey I have (2) 150's top handle that I did the side hole in muffler. They run great. I bought a rear handle 150 last fall and just did the muffler like you did. Will it benefit at all with having the main hole enlarged and a side hole drilled or no?

blsnelling · Jan 23, 2016

Your mods look good...exactly what I do to them. I also bend the deflector on the muffler out just a bit.

SixGun · Jan 24, 2016

arboristdean1130 said:
Hey I have (2) 150's top handle that I did the side hole in muffler. They run great. I bought a rear handle 150 last fall and just did the muffler like you did. Will it benefit at all with having the main hole enlarged and a side hole drilled or no?

Just enlarging the output hole should be fine and it wont be as loud.

SixGun · Jan 24, 2016

blsnelling said:
Your mods look good...exactly what I do to them. I also bend the deflector on the muffler out just a bit.

Thanks Brad. I will try bending out the deflector on the next one. Hope all is well by you, we just got Hammered with snow.

blsnelling · Jan 24, 2016

SixGun said:
...we just got Hammered with snow.

Yes, and I'm extremely jealous, lol. We got nothing.

Toomuchsawdust · Oct 13, 2016

I bought a 150tc today and promptly disassembled it and followed your instructions. IT RIPS SO HARD. Thanks bud. Any tips about tuning the carb?

SixGun · Oct 13, 2016

Tuning those carbs can be a little tricky as the 150s have a wicked rev limiter. Always start at original setting or richer
The best way is to do repeated test cuts while slowly making adjustments to H screw in between cuts.
Most likely you will feel when saw has optimal power, this is where you want to be
It seems to me that when tuned properly, you can hear the saw bouncing off the rev limiter when cutting 4 to 5 inch wood.
Hope this helps

THESTUMPMAN · Sep 15, 2020

I know it's an old thread but I'm looking to advance the timing on my MS150t and was hoping I could get some clearer before and after pictures of the key so I know what I should be grinding off if that is at all possible please?