Dolmar 421problem

[woodbutcher56]

Missing the 421!! Hauled the 455 Rancher to the woods yesterday cut a couple hours. It's considerably heavier faster in the cut though! Has me longing for a light 50cc saw that's strong and fast in the wood!

 

[woodbutcher56]

Just got off the phone with the Dolmar dealer, he said he checked for air leaks and found none. He said he cleaned the carb and didn't see any obstructions but there could have been. He said the piston and cylinder look good. He said he retuned the saw low stayed the same 1 1/2 out the high was 1 3/4 out before 2 1/2 out now. That seems like a lot to me . They ran the saw a couple times for 15 -20 minutes with no idle problems. I'm going to pick it up tomorrow. Hopefully all is well. I'll keep you posted.

 

[woodbutcher56]

I took the saw to the woods today , ran a tank of gas through it , no idle issues. The saw was however hitting the Rev limiter at wot in the wood. Not every cut but frequently .Is that because it's tuned too rich on the high??? Is it a problem? I don't have the tool for adjusting the high. Before the idle issue I was contemplating removing the cat, I'm a little leery now , maybe wait and he sure there are no more issues.

 

[woodbutcher56]

Took the saw to the woods today , ran a tank of gas through it cutting some oak. No idle issues. The saw did however hit the rev limiter at wot in the cut, not every cut but frequently. Could this be caused by the high speed being too rich? The dealer said it was between 1/2 and 3/4 turn out from original setting. Is this a problem? I don't have the tool to adjust the high.

 

[woodbutcher56]

I was thinking of removing the cat before the idle issue now I'm a little leery since there was an issue and the saw is under warranty .I think I'll wait and make sure there are no more problems.

 

[sugarbush]

if hitting the limiter its to lean. take it back to the dealer. take a stick of wood with you and show him what your concerned about.

 

[woodbutcher56]

Well that's what I thought. The dealer said when he retuned the high was out 3/4 turn more than the original setting and the saw was not hitting the limiter then. I'm wondering what's up with that????

 

[Chris-PA]

How do you know it was hitting the rev limiter?

 

[woodbutcher56]

Maybe I'm confused about what I'm hearing. I'll be back in the woods tomorrow . Maybe I'll make a short video and see if I can figure out how to post it. The dealer said he tuned it to spec. I can't believe it's too lean being 3/4 turn out from factory setting. I'll check in tomorrow afternoon. Thanks all for your input!!

 

[birddogtg]

Missing the 421!! Hauled the 455 Rancher to the woods yesterday cut a couple hours. It's considerably heavier faster in the cut though! Has me longing for a light 50cc saw that's strong and fast in the wood!

I have a ported 550xp that's in real nice shape that I may sell.

 

[Chris-PA]

It's not that easy to tell the difference between the sound of 4-stoking and that of the rev limiter.

 

[woodbutcher56]

Back to the woods today the saw was not hitting the limiter just back and forth between clean and 4 stroke. The high idle problem came back after running for about 40 minutes in some oak. Ran a whole tank of gas through it yesterday with no problems. When I opened the gas cap to check the fuel , about 1/4 tank, it hissed and I'm not sure if it was sucking air or releasing pressure . Should have been paying closer attention! I called the dealer he said he would call Dolmar and told me to bring the saw back. I made a short video of the high idle ,not sure how to post it. Gmail would not let me email it to the dealer file is too big.

 

[sugarbush]

look in the opening under the primer bulb to look at the red fuel line to make sure it hasn't slide loose. you'l need a flashlite.

 

[woodbutcher56]

Thanks! Looked , there is a yellow and orange line both appear to be where they belong.

 

[woodbutcher56]

Just a side note. This problem didn't start until I changed the spark plug?? I don't see how that could have anything to do with it. Maybe a coincidence! Could it be getting warm and pulling air from around the crush washer on the plug????

 

[merc_man]

Just a side note. This problem didn't start until I changed the spark plug?? I don't see how that could have anything to do with it. Maybe a coincidence! Could it be getting warm and pulling air from around the crush washer on the plug????

Iv had a few saws leak at the spark plug while pressure vac testing and never caused no running isues.

Sent from my SM-J320W8 using Tapatalk

 

[sugarbush]

the dealer will have to figure it out. does sound like an air leak. the dealer may have just checked pressure and not vacuum for leak test.

 

[woodbutcher56]

I'm at a loss! I don't know what to think! Something ain't right!!

 

[woodbutcher56]

How about the fuel pick up line collapsing would / could that cause intermittent problems?

 

[sugarbush]

if fuel line collapsed it would accelerate a few seconds then quit. will it idle to fast with a cold engine or have to get good an warm.