Nik's Poulan Thread

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If I want to put new rings in a 3400 (p&c are fine just low comp) all I do is ball hone the cylinder, or is there more?


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I did mic the bore and the piston from the 3400 last night. Someone reported the bore should be 1.810", I got 1.814" very consistently top to bottom (o.k. maybe +0.0005 at the top) and very round. The piston is only 1.807" so I guess 0.007" clearance is a bit much. Decisions, decisions...NOS 3400 top end, find a better used one, or look for a 3700??? Of course if I could find a reasonable 3700 piston and cylinder the choice would be obvious.

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I also put this one on the bench, was supposed to be a runner and in 8 pulls it was. I tried adjusting the carburetor but this one is not exactly...snappy...I assume it should be a bit quicker on the pick up than it is. I did not check the compression but it is not stellar. Reminds me of a worn out 10-10 with the bullfrog carburetor.

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Mark
 
Ok, if I get caber rings does anyone have the item number for them so I know it's correct?


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I also put this one on the bench, was supposed to be a runner and in 8 pulls it was. I tried adjusting the carburetor but this one is not exactly...snappy...I assume it should be a bit quicker on the pick up than it is. I did not check the compression but it is not stellar. Reminds me of a worn out 10-10 with the bullfrog carburetor.

Mark

My 306 is pretty snappy. Not sure hat the comp number is but I can check if you like.
 
If I want to put new rings in a 3400 (p&c are fine just low comp) all I do is ball hone the cylinder, or is there more?


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I've never ball honed a cylinder. Just used some red scotch Brite. Using a hone requires slow turns and oil. Not sure it makes a difference. How low is low Comp? You're not going to get 150. I have one that runs great at 120.

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