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a. palmer jr.

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I have on my bench one of the dreaded Mini-Macs that owner wanted running. Saw has what looks like bar oil coming out of the muffler. I drained the bar oil and the oil keeps coming. The fuel tank appears to have fuel in it. Of course the engine won't pull over, appears stuck. I may return it unfixed, probably cost more to repair it than he can sell it for..
 

huskyboy

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While we’re on subject of 5 series saws, my 2253 was starting to act like it was flooding itself (off idle bog after 10 secs) as it must’ve thought the mods i did to it were a massive air leak... had to remove the little brass plug and 1/4 turn ccw. Problem solved and the lightning fast throttle response returned. It was getting worse with more run time after I did the mods.
 

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huskyboy

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I’m also wondering, maybe these carbs are designed to adjust to 50:1 mix and some oils may be too thick for autotune/mtronic to calibrate to at richer 40:1/32:1 ect. Add the mods/porting on top of that and it screws up the adjustments? Then they need a re calibration? Just thinking.
 

Deets066

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I’m also wondering, maybe these carbs are designed to adjust to 50:1 mix and some oils may be too thick for autotune/mtronic to calibrate to at richer 40:1/32:1 ect. Add the mods/porting on top of that and it screws up the adjustments? Then they need a re calibration? Just thinking.
32:1 is leaner mix than 50:1

More oil yes, but that means less fuel
 

Moparmyway

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While we’re on subject of 5 series saws, my 2253 was starting to act like it was flooding itself (off idle bog after 10 secs) as it must’ve thought the mods i did to it were a massive air leak... had to remove the little brass plug and 1/4 turn ccw. Problem solved and the lightning fast throttle response returned. It was getting worse with more run time after I did the mods.
My 562 and 661 are running on 12.5 to 1

They aint exactely "normal" and I dont have any problems
 

huskyboy

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My 562 and 661 are running on 12.5 to 1

They aint exactely "normal" and I dont have any problems
My 562 has zero problems modded the same way as the 2253. I think the 562 has a zama and the 2253/550 a walbro. I do think the way the autotune runs is a little better on 562 for some reason.
 
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