Ms 150 exhaust mod, spark plug

[Hats]

Hi guys I modded my ms 150 exhaust, drilled a 6mm hole where I'm supposed to and yep like it much nicer saw. I have attached a pic of my plug after running it for a bit could people tell me if it's too rich, too lean of just perfect. Thanks guys

[Darrin Turnbull]

[spudulike]

[attach]175672[/attach]

 

That pic looks familiar:sneaky2:

 

The plug looks OK, perhaps a tad lean but no badly so. You could try giving the H screw a 1/8 turn counter clockwise just in case!

[Hats]

Ok thanks I will give the h screw a twist thanks for your input, any more opinions welcome

[MATTMOSS]

I agree with spud, if anything that plug looks like it's running a little lean. As already been said rich up the h screw a bit and inspect again after a tank or two of fuels gone through.

[Hats]

I just went to adjust the H screw and I've not touched it since new (3months old) I couldn't turn the H screw anticlockwise only clockwise so spud are you sure you mean anti clockwise and not an 1/8th turn clockwise. ? As that's the only direction I can turn it from factory setting. Cheers lads

[spudulike]

I just went to adjust the H screw and I've not touched it since new (3months old) I couldn't turn the H screw anticlockwise only clockwise so spud are you sure you mean anti clockwise and not an 1/8th turn clockwise. ? As that's the only direction I can turn it from factory setting. Cheers lads

 

You turn the adjusters clockwise (in) to LEAN the mix. If you can't turn the screw anti clockwise it will be due to the limit caps that are fitted. These caps ensure that you can't over lean or over rich the carb.

 

If you need to turn the mix out any further, you need to find how to stop the limit caps stopping the adjustment. I can't remember how these saws limit the H screw - the MS201 needs a pin drilling and removing although you can sometimes get adjustment using a small allen key. Most later carbs have palstic limit caps that can be removed or clipped back.

 

A 6mm hole shouldn't make too much difference TBH!

[Hats]

Thanks ill run it all tomorrow then post another pic. I would appreciate your opinion again spud. Cheers

[Hats]

New pics from today better close ups. This is it after being used all morning today. Opinions please. I'm thinking it looks about right

[Hats]

Again