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Author Topic: 670 Super II looses power when in the cut  (Read 727 times)

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Offline Skattracker2

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670 Super II looses power when in the cut
« on: August 24, 2015, 09:52:03 PM »
Thanks to this awesome forum I was able to fix my wife's Jonsered 2152 with a new coil.  Now maybe you guys can work your magic on the 670 Super II I have.

I bought it to replace my stolen 2159 and it ran good but didn't have a chain so I couldn't try cutting.

I got it home put on a new bar and chain and it looses power in cut and seems to be running rich with blue smoke.  I rebuilt the carb even though it looked clean and maybe was rebuilt recently.  I changed out the gas and checked fuel and air filter and they are clean.  The muffler screen is clean also.

I tried adjusting the high on carb and it did not seem to move much or do anything. 

What are your thoughts?

Offline 346xp

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Re: 670 Super II looses power when in the cut
« Reply #1 on: August 25, 2015, 10:52:43 AM »
Pressure test the carb for a  needle leak and or a welch plug leak both will dump a lot of gas into the engine making it pig rich  8)

Offline 346xp

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Re: 670 Super II looses power when in the cut
« Reply #2 on: August 25, 2015, 10:56:27 AM »
I'm glad you got the 2152 sorted out!!!  Did they warranty the coil for you ?? 8)

Offline Skattracker2

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Re: 670 Super II looses power when in the cut
« Reply #3 on: August 25, 2015, 05:12:06 PM »
I just bought a new one.  The dealer didn't want anything to do with the saw since I had rebuilt the engine already.

Offline sablatnic

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Re: 670 Super II looses power when in the cut
« Reply #4 on: August 25, 2015, 11:03:26 PM »
If the engine mounts are bad, the saw will flex too much to fully open the throttle when cutting.

Offline 346xp

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Re: 670 Super II looses power when in the cut
« Reply #5 on: August 26, 2015, 10:39:46 AM »
Pressure for needle pop off should be 8-10 psi !!anything under that its leaking past the needle aka flooding the engine 8)


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