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Author Topic: Dolmar 5000  (Read 8049 times)

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Offline dolmarfan

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Re: Dolmar 5000
« Reply #70 on: October 29, 2012, 03:43:31 am »
The seting of the carb at full trothle the chainsaw is 4 stroking.
Sorry for my english!
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Offline brokenbudget

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Re: Dolmar 5000
« Reply #71 on: October 29, 2012, 05:06:16 am »
Quote from: dolmarfan on October 29, 2012, 03:43:31 am
The seting of the carb at full trothle the chainsaw is 4 stroking.
Sorry for my english!

are you sure your low isn't set to rich and the high too lean? and is it maybe bouncing off the rev limiter making it sound like it's rich?
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Offline dolmarfan

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Re: Dolmar 5000
« Reply #72 on: October 29, 2012, 07:21:33 am »
The limiter caps are off.
I am sure is 4 stroking because if I take half a turn out on the H needle the chainsaw has no power and is making a lot of smoke!
The L needle is tuned also a bit rich!
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Offline brokenbudget

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Re: Dolmar 5000
« Reply #73 on: October 29, 2012, 07:47:29 am »
 :)no i mean the rev limiter in the coil for the ignition :)
it will make a lot of smoke if it is hitting the limiter as your dumping unburned fuel into the hot muffler.
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Offline dolmarfan

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Re: Dolmar 5000
« Reply #74 on: October 29, 2012, 09:00:18 am »
 Dont have a tach but I dont think is hitting the rev limiter! :)
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Offline dolmarfan

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Re: Dolmar 5000
« Reply #75 on: November 09, 2012, 11:48:43 am »
I find a tach and my dolmar is hiting 13500 rpm with the H needle 3 turns out
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Offline brokenbudget

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Re: Dolmar 5000
« Reply #76 on: November 09, 2012, 05:14:46 pm »
i'd start looking for an air leak. no reason that screw should be that far out.
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Offline Magnus

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Re: Dolmar 5000
« Reply #77 on: November 10, 2012, 08:02:04 pm »
There are more things than air leak.. Could be wrong setting on main inlet needle or restricted fuel supply in some way.
After 2 tyrns out it is fully open and get what main needle and channels can provide
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Offline brokenbudget

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Re: Dolmar 5000
« Reply #78 on: November 11, 2012, 01:59:54 am »
any time somebody complains about a saw that runs a little on the rich side while doing the small cutting, then the saw going lean while cutting bigger wood leads to either a tank vent issue or an air leak. could also be a fuel filter or inlet screen, but the saw is a little new for those issues to be poping up now. considering the saw has already ruined one piston, obviusly the problem wasn't fixed. i would take a look around the site here on how to do a pressure/vac test to either prove or disprove this. it's a fast easy test. why not take the time to do it?
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Offline Magnus

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Re: Dolmar 5000
« Reply #79 on: November 11, 2012, 03:46:11 am »
What is the L needle setting? Is that two turns (or more) out as well? Is Idle strong and steady? Change in rpm as it change position? Hesitate on acceleration? Run strong in wood?

The 13 500rpms was without load and bar/chain mounted?
It is not that uncommon rpm as it hits limiter and can't go higher.

Pressure test is a good start. Test carb as well when you have the stuff out. Set carb under pressure so you see when needle open.
By adjusting the lever under pressure it gives more accurate amount of fuel.
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