Author Topic: Dolmar PS-421 mods  (Read 1125 times)

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Offline Nathaniel Vansickle

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Dolmar PS-421 mods
« on: July 11, 2014, 10:31:17 am »
Had a 421 on the bench making a few minor adjustments. Thought I would share
5105H and 6400H in stock

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Dolmar, Echo, Jonsered

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Offline Nathaniel Vansickle

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Re: Dolmar PS-421 mods
« Reply #1 on: July 11, 2014, 10:33:01 am »
Most popular mod is removing the cat. Which is pretty simple to do. The muffler is 3 pieces with the cat spot welded into the center piece. Drill the 2 spot welds and the cat comes out.
5105H and 6400H in stock

Performance Outdoor Equipment
performanceoutdoorequipment.com
Dolmar, Echo, Jonsered


Offline Nathaniel Vansickle

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Re: Dolmar PS-421 mods
« Reply #2 on: July 11, 2014, 10:34:19 am »
And no more cat
5105H and 6400H in stock

Performance Outdoor Equipment
performanceoutdoorequipment.com
Dolmar, Echo, Jonsered


Offline Nathaniel Vansickle

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Re: Dolmar PS-421 mods
« Reply #3 on: July 11, 2014, 10:35:20 am »
After the cat is gone I use the embossed area as my outline for the opening
5105H and 6400H in stock

Performance Outdoor Equipment
performanceoutdoorequipment.com
Dolmar, Echo, Jonsered


Offline Nathaniel Vansickle

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Re: Dolmar PS-421 mods
« Reply #4 on: July 11, 2014, 10:36:25 am »
The only real problem we have had with these saws is the fuel line coming off the nipple inside the tank. That issue is solved by adding an O ring to the fuel line for that little bit of extra clamping power.
5105H and 6400H in stock

Performance Outdoor Equipment
performanceoutdoorequipment.com
Dolmar, Echo, Jonsered


Offline Nathaniel Vansickle

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Re: Dolmar PS-421 mods
« Reply #5 on: July 11, 2014, 10:38:23 am »
This saw didn't get it but I took a couple pictures just to show what is needed for installing a .325 bar and chain on these saws. A clutch drum and bar from a 5105 plus a 10x16x.2 mm shim is needed. This is probably a worthwhile modification just to have rim sprockets instead of spur. The bar needs slight modification to allow it to oil. We drill 2 holes in the groove down through into the adjuster holes. Black lines show where to drill.
5105H and 6400H in stock

Performance Outdoor Equipment
performanceoutdoorequipment.com
Dolmar, Echo, Jonsered


Offline Nathaniel Vansickle

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Re: Dolmar PS-421 mods
« Reply #6 on: July 11, 2014, 10:48:11 am »
More to add to this when time permits.
5105H and 6400H in stock

Performance Outdoor Equipment
performanceoutdoorequipment.com
Dolmar, Echo, Jonsered


Offline Cut4fun .

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Re: Dolmar PS-421 mods
« Reply #7 on: July 11, 2014, 12:01:09 pm »
Great info. Thanks for sharing this.
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Offline Nathaniel Vansickle

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Re: Dolmar PS-421 mods
« Reply #8 on: July 11, 2014, 12:40:30 pm »
I will add the dual bucking spike when I have free time to disassemble my saw for pics.
5105H and 6400H in stock

Performance Outdoor Equipment
performanceoutdoorequipment.com
Dolmar, Echo, Jonsered


Offline Cut4fun

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Re: Dolmar PS-421 mods
« Reply #9 on: July 11, 2014, 12:59:43 pm »
Where you use O-ring on line fix.  I have used very small zip ties with success on other saws.  Never thought of O-ring, was this a OEM update fix?
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