Author Topic: Dolmar 7300  (Read 437 times)

0 Members and 0 Guests are viewing this topic.

Offline Cut4fun .

  • Administrator
  • Nitro Hotsaw
  • *******
  • Posts: 22574
  • Karma: 591
  • OHIO REDNECK Saw Repair Getter Done
    • Redneck Chainsaw Repair
Dolmar 7300
« on: April 08, 2020, 07:37:57 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.

REDNECK Saw Repair Getter Done

Share on Facebook Share on Twitter

Like Like x 1 View List

Offline Cut4fun .

  • Administrator
  • Nitro Hotsaw
  • *******
  • Posts: 22574
  • Karma: 591
  • OHIO REDNECK Saw Repair Getter Done
    • Redneck Chainsaw Repair
Re: Dolmar 7300
« Reply #1 on: April 08, 2020, 04:02:24 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.

https://www.ereplacementparts.com/makita-dcs7301-73cc-chainsaw-parts-c-97_98_245_9468.html?osCsid=evbp2mj3j98lh6n8l7tq0ppuf6

https://www.sawagain.com/dolmar-ps-630-6400-7300-7310-7900-7910-makita-dcs-6400-7300-7900-carburetor-manifold-flange-new-oem-038171041/

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/



REDNECK Saw Repair Getter Done
Like Like x 1 View List

Offline Cut4fun .

  • Administrator
  • Nitro Hotsaw
  • *******
  • Posts: 22574
  • Karma: 591
  • OHIO REDNECK Saw Repair Getter Done
    • Redneck Chainsaw Repair
Re: Dolmar 7300
« Reply #2 on: April 08, 2020, 05:50:44 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.



REDNECK Saw Repair Getter Done

Online 3000 FPS

  • Moderator
  • Nitro Hotsaw
  • *******
  • Posts: 4547
  • Karma: 291
  • Location: Carpenter, Wyoming
Re: Dolmar 7300
« Reply #3 on: April 08, 2020, 10:15:18 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. 
PP 505, 475, 445.

Offline Cut4fun

  • Administrator
  • Nitro Hotsaw
  • *******
  • Posts: 4334
  • Karma: 189
  • OHIO REDNECK
Re: Dolmar 7300
« Reply #4 on: April 09, 2020, 08:07:32 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.





REDNECK Saw Repair

Offline Cut4fun .

  • Administrator
  • Nitro Hotsaw
  • *******
  • Posts: 22574
  • Karma: 591
  • OHIO REDNECK Saw Repair Getter Done
    • Redneck Chainsaw Repair
Re: Dolmar 7300
« Reply #5 on: December 29, 2020, 10:48:08 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 ???

REDNECK Saw Repair Getter Done

Online 3000 FPS

  • Moderator
  • Nitro Hotsaw
  • *******
  • Posts: 4547
  • Karma: 291
  • Location: Carpenter, Wyoming
Re: Dolmar 7300
« Reply #6 on: December 30, 2020, 04:08:30 pm »
Who did the rebuild.
PP 505, 475, 445.

Offline Cut4fun .

  • Administrator
  • Nitro Hotsaw
  • *******
  • Posts: 22574
  • Karma: 591
  • OHIO REDNECK Saw Repair Getter Done
    • Redneck Chainsaw Repair
Re: Dolmar 7300
« Reply #7 on: December 31, 2020, 07:45:03 am »
Who did the rebuild.

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.
REDNECK Saw Repair Getter Done

Online 3000 FPS

  • Moderator
  • Nitro Hotsaw
  • *******
  • Posts: 4547
  • Karma: 291
  • Location: Carpenter, Wyoming
Re: Dolmar 7300
« Reply #8 on: December 31, 2020, 03:35:43 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.   
PP 505, 475, 445.

Offline Al Smith

  • Moderator
  • Nitro Hotsaw
  • *******
  • Posts: 2778
  • Karma: 179
Re: Dolmar 7300
« Reply #9 on: February 27, 2021, 09:40:58 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" .
Like Like x 1 View List

 

Related Topics

  Subject / Started by Replies Last post
1 Replies
1202 Views
Last post March 10, 2012, 07:00:24 am
by MCW
0 Replies
440 Views
Last post February 04, 2013, 08:22:02 am
by Cut4fun
3 Replies
310 Views
Last post April 13, 2013, 02:21:07 pm
by 660magnum
17 Replies
653 Views
Last post January 26, 2014, 09:59:09 am
by Cut4fun .
6 Replies
1004 Views
Last post June 30, 2017, 05:39:15 pm
by Philbert
7 Replies
72 Views
Last post February 05, 2014, 09:06:04 pm
by KilliansRedLeo
31 Replies
929 Views
Last post March 04, 2014, 05:20:16 pm
by 660magnum
26 Replies
593 Views
Last post April 02, 2014, 09:03:00 pm
by Cut4fun .
59 Replies
627 Views
Last post December 03, 2014, 07:51:38 pm
by 660magnum
0 Replies
576 Views
Last post May 25, 2018, 09:23:42 am
by Cut4fun .