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Huztl MS660

Brownthumb

Brownthumb

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I like blue colored saws over the orange ones.
They appear to have fixed most of the problems. This one the only thing I swapped was the decomp valve.
Cylinder timing stock with gasket is.
20 squish
ex 94 deg
Trans 125 deg
Intake 84 deg
Thinking going to 117 on transfers and leave the rest alone.
I don’t watch Bedfords vids either just his voice gets on my nerves.
Any input image.jpg image.jpg
 
MustangMike

MustangMike

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I would either leave the transfer alone, or not go numerically under 120, but I do like to add bridge ports.

IMO, if you raise the transfer that much you reduce velocity too much. I would leave it where it is.

The longer stroke 660 (compared to 440/460) seem to like higher Ex and lower In, your #s are fine. Widen both ports to I .050 of the skirts and leave a shallow arch with good bevels and it will run very well. I usually advance the timing .030 of the key on these.
 
Brownthumb

Brownthumb

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Thanks Mike, I read all of your posts on the 440 460 hybrid and built one but caught a ring and she squealed like a pig and came to a dead stop.
I chucked the ported 440 head that gave me all sorts of problems back on and she runs great.
The timing advance must have straightened her out.
Back to the 660. I raised the transfers to 120 put some bridges in, widened the ex. Cleaned up the intake a little.
Honestly how bad of a job did I do? I do know of one screw up.
 

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Brownthumb

Brownthumb

ArboristSite Operative
Joined
Apr 12, 2019
Messages
121
Age
55
Location
Basement
Looks good to me, tell us how it runs!
She runs real good but I need some bigger wood.
Noodled some logs with it and was impressed.
100% farmertec right down to the bar and chain except the on off choke rod has a harbor freight small funnel end wrapped around the shaft to make the high idle work.
180 compression and she wants to tear my arm off? image.jpg
 
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