Dolmar 5105 carburetor adjust?

[a. palmer jr.]

Working on a 5105 Dolmar that the owner says doesn't run right. The carburetor appears to be non-adjustable. Is it a good idea to either change the carb to an older one or try to drill into the metal that covers the screws, assuming there's screws under that thing. Maybe I should replace it with a 5100S carb?

 

[Jke-Hrtzll]

There should be two screws with plastic caps on them so they cannot turn. The caps should pull right off. 219 and 218

 

[J.W Younger]

View attachment 634960 There should be two screws with plastic caps on them so they cannot turn. The caps should pull right off. 219 and 218

That sure looks just like the carb on mine but it was built Jan of 09. I think they have been getting more devious with their methods since then.

 

[User Name Here]

It's probably got a white long epoxy over them. Mine did. I drilled and heated and picked mine out, until I could cut off the aluminum "shroud" around them. It might be cheaper to get a new carb. I know it would be easier, since you have top pull the carb to get the epoxy out anyway.

 

[a. palmer jr.]

Mine has the square tube with the epoxy in it. I'm wondering if I could heat it up with the mini-torch and loosen up the epoxy. I may go to my local Dolmar dealer and see if he has a 5100S carb for it. I'd probably have to rebuild it but that's no biggy.

 

[a. palmer jr.]

This one also has the catalytic converter on it. If it was my saw that thing would get removed, like yesterday..

 

[User Name Here]

That was why I removed the epoxy on mine, so I could retune after the muffler mod

 

[SteveinUT]

My EA4300 has the epoxied H screw but even with the cat gutted, it still four-strokes good at wide open. So, I'll get to the epoxy eventually. But, I'm at 6,000', so it's going to run rich, even with the cat removed and no adjustment on the H. I'm not sure how lean you'd be in Indiana.

 

[handovrfst]

Working on a 5105 Dolmar that the owner says doesn't run right. The carburetor appears to be non-adjustable. Is it a good idea to either change the carb to an older one or try to drill into the metal that covers the screws, assuming there's screws under that thing. Maybe I should replace it with a 5100S carb?

A 2014 5105 Canadian model came without the limiters tabs on the jets screws but with a Cat muffler.
A new zealand or australia issue came without the cat mufflers according to a parts list. The non cat muffler part number for these countries is 181 174 201. Hope this helps some.

 

[ncfarmboy]

I can't say for positive but I thought there was a recall on those epoxy carb's . Free replacement. @166 says get a C1Q-DM-13.
Shep

 

[a. palmer jr.]

My EA4300 has the epoxied H screw but even with the cat gutted, it still four-strokes good at wide open. So, I'll get to the epoxy eventually. But, I'm at 6,000', so it's going to run rich, even with the cat removed and no adjustment on the H. I'm not sure how lean you'd be in Indiana.

Not sure, but I've never actually started the saw yet, just received it today along with two other saws to work on. I'll probably get to this one next week after I see if the dealer has any carbs in stock..

 

[a. palmer jr.]

I started the saw today and like the owner said, it doesn't run right. I tried a new spark plug which didn't help so I started digging into the epoxy on the carb. I used a mini-torch to loosen the epoxy but I will say that must be high temp epoxy because it didn't loosen much. I left it soaking a bit in some epoxy reducer to see if that'll loosen it up. I thought the epoxy was just a cap but it appears to run all down into that tube so it may be awhile. Dolmar dealer didn't have a carb for it, new or used so I'm stuck with this one for now..

 

[User Name Here]

Yeah the epoxy goes all the way down the length of the screws. I don't think you'll be able to get all the epoxy out without cutting that surrounding aluminum off of the carb.

 

[a. palmer jr.]

I've got a Dremel and a lot of spare time.. I'm kinda hoping the thinner will loosen it a bit but doubt it will be that easy. I've got enough epoxy out to see the screw heads..

 

[User Name Here]

At least that's the way mine was. Both screws completely encased in epoxy.

 

[User Name Here]

I used my dremel a lot. Heated some with a torch but once i got the aluminum "sleeve" off it went rather quick

 

[a. palmer jr.]

Looks like that's how I'm going to do it, just cut it off and scrape some of the epoxy afterward. I still wonder if that's what's wrong with the saw. It seems like it has a miss in it which may be fuel related but it still might be the ignition module. I may take that cat muffler off and check into it also, might be clogged but I doubt it. Good thing I'm not working by the hour..

 

[a. palmer jr.]

I finished taking the can off the H and L screws and cleaned the screws up along with the carburetor. The saw did fire up but still misses. I guess I'll try a coil on it since it already has a new spark plug and I didn't notice the plug wire or kill wire shorting to anything. I tried adjusting the carb but it didn't help..

 

[DOL51CUTIT]

Any pics of the epoxy, then exposed screws?

 

[DOL51CUTIT]

found the pics in another thread thanks