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#Post#: 42715--------------------------------------------------
Dolmar PS-421 mods
DIR By: NathanielVansickle
Date: July 11, 2014, 9:31 am
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Had a 421 on the bench making a few minor adjustments. Thought I
would share
#Post#: 42716--------------------------------------------------
Re: Dolmar PS-421 mods
DIR By: NathanielVansickle
Date: July 11, 2014, 9:33 am
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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.
#Post#: 42717--------------------------------------------------
Re: Dolmar PS-421 mods
DIR By: NathanielVansickle
Date: July 11, 2014, 9:34 am
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And no more cat
#Post#: 42718--------------------------------------------------
Re: Dolmar PS-421 mods
DIR By: NathanielVansickle
Date: July 11, 2014, 9:35 am
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After the cat is gone I use the embossed area as my outline for
the opening
#Post#: 42719--------------------------------------------------
Re: Dolmar PS-421 mods
DIR By: NathanielVansickle
Date: July 11, 2014, 9:36 am
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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.
#Post#: 42720--------------------------------------------------
Re: Dolmar PS-421 mods
DIR By: NathanielVansickle
Date: July 11, 2014, 9:38 am
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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.
#Post#: 42721--------------------------------------------------
Re: Dolmar PS-421 mods
DIR By: NathanielVansickle
Date: July 11, 2014, 9:48 am
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More to add to this when time permits.
#Post#: 42723--------------------------------------------------
Re: Dolmar PS-421 mods
DIR By: Chainsawrepair
Date: July 11, 2014, 11:01 am
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Great info. Thanks for sharing this.
#Post#: 42728--------------------------------------------------
Re: Dolmar PS-421 mods
DIR By: NathanielVansickle
Date: July 11, 2014, 11:40 am
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I will add the dual bucking spike when I have free time to
disassemble my saw for pics.
#Post#: 42731--------------------------------------------------
Re: Dolmar PS-421 mods
DIR By: Cut4fun
Date: July 11, 2014, 11:59 am
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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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