(DIR) Return Create A Forum - Home
---------------------------------------------------------
Chainsaw Repair
(HTM) https://chainsawrepair.createaforum.com
---------------------------------------------------------
*****************************************************
(DIR) Return to: Dolmar Makita
*****************************************************
#Post#: 86473--------------------------------------------------
Dolmar 7300
By: Chainsawrepair Date: April 8, 2020, 6:37 am
---------------------------------------------------------
Dolmar 7300 back firing aka sheared key. Not needed. So cleaned
up both sides lined up and tightened down. Coil gap imo to tight
so just used my business card to reset gap. Fired right up and
running.
#Post#: 86475--------------------------------------------------
Re: Dolmar 7300
By: Chainsawrepair Date: April 8, 2020, 3:02 pm
---------------------------------------------------------
Test cutting and wont go full throttle.
Well this saw has more issues. New boot was installed at a shop.
The dang flange is broke and someone tried using a wrong size
nut and basically slides onto the carb bolt. So only 1 side
was even securing the carb.
So got it torn apart with a new little bolt that fits the carb
bolt and trying to redneck it into the flange. If this holds
tommorrow I wont need to order a flange and 2 square nuts.
Carb was full of fines on both sides too. Dont appear to been
apart for a long time. Might need a carb kit too.
Least the H side limiter is now grinded off.
(HTM) https://www.ereplacementparts.com/makita-dcs7301-73cc-chainsaw-parts-c-97_98_245_9468.html?osCsid=evbp2mj3j98lh6n8l7tq0ppuf6
(HTM) https://www.sawagain.com/dolmar-ps-630-6400-7300-7310-7900-7910-makita-dcs-6400-7300-7900-carburetor-manifold-flange-new-oem-038171041/
(HTM) https://www.sawagain.com/dolmar-ps-630-ps-6300-ps-6400-ps-7300-ps-7310-ps-7900-ps-7910-makita-dcs-6401-dcs-642120-dcs-7301-dcs-7901-rb-122-zama-carburetor-kit/
#Post#: 86476--------------------------------------------------
Re: Dolmar 7300
By: Chainsawrepair Date: April 8, 2020, 4:50 pm
---------------------------------------------------------
The nut you could basically slide on the carb bolt. New nut
one that least goes on right.
Redneck fix for the win. Test cut with 24” full skip and 8t. I
would do a 7t myself.
#Post#: 86477--------------------------------------------------
Re: Dolmar 7300
By: 3000 FPS Date: April 8, 2020, 9:15 pm
---------------------------------------------------------
I do not believe I have ever seen a key shear on a chainsaw
before. That thing must have come to a stop pretty fast so
that the momentum of the fly wheel sheared the key.
#Post#: 86478--------------------------------------------------
Re: Dolmar 7300
By: Cut4fun Date: April 9, 2020, 7:07 am
---------------------------------------------------------
Saving info. Fly side crank. He said he cut m8x1.25 threads
before reinstalling and then shearing key.
I think it was more of both surfaces wasnt cleaned good and fly
not tightened good. Just my WAG
He also had used red loctite. Thanks goodness it didnt hold on
nut.
Pic of threads before die used. They looked good when I seen
them now. But was leery to tighten down like I normally do.
#Post#: 87525--------------------------------------------------
Re: Dolmar 7300
By: Chainsawrepair Date: December 29, 2020, 9:48 am
---------------------------------------------------------
Dolmar 7300 scored cylinder. Going to see if can save cylinder.
He said new intake boot had tore and cylinder bolt had came out
after 2 tanks on a rebuild. :o ???
#Post#: 87527--------------------------------------------------
Re: Dolmar 7300
By: 3000 FPS Date: December 30, 2020, 3:08 pm
---------------------------------------------------------
Who did the rebuild.
#Post#: 87528--------------------------------------------------
Re: Dolmar 7300
By: Chainsawrepair Date: December 31, 2020, 6:45 am
---------------------------------------------------------
[quote author=3000 FPS link=topic=7429.msg87527#msg87527
date=1609362510]
Who did the rebuild.
[/quote]
Owner and small shop south together I think. He said the shop
pressure tested and it was all good when cylinder put back on.
I ask owner if cylinder had been cleaned up before. He said yes
by him.
#Post#: 87529--------------------------------------------------
Re: Dolmar 7300
By: 3000 FPS Date: December 31, 2020, 2:35 pm
---------------------------------------------------------
Well it would not be the first time I have seen cylinder bolts
come loose. I have a Stihl that I bought used and about 2
years after I had it the cylinder bolts came loose.
#Post#: 87716--------------------------------------------------
Re: Dolmar 7300
By: Al Smith Date: February 27, 2021, 8:40 am
---------------------------------------------------------
Unless I'm mistaken a 7300 Dolmar is the same as a 7300 Makita
which is the same basic engine as the two DPC 7321 concrete
saws I've been tinkering with .50 mm bore 37 mm stroke
Different ratings ranging from 5.1 to 5.6 HP .
I'm thinking I ran a new one as a demo brought by a dealer to
one of the GTG's some time ago and it had plenty of go get-em .
I can't remember though exactly when or where .That said it's
the only one I've ever seen .
What I do remember was it was a pretty plump log around 40 inch
and it never as much as hickuped going through it wearing a 24"
.
*****************************************************