My new Dolmar 5105

[Officer's Match]

How about the gas ? The service guy said that I should use 95 octane because higher would be too "dry", any thoughts about this? From what I know so far the higher octane the better, so why would he say that?

I haven't experimented with this, but I wonder if an M-Tronic which can alter it's timing will make more power with higher octane?

One reason I do tend to go at least 91 octane is the octane drop over time. That's also why I don't make a lot of mix at a time, don't want it sitting around too long.

 

[J.W Younger]

I haven't experimented with this, but I wonder if an M-Tronic which can alter it's timing will make more power with higher octane?

One reason I do tend to go at least 91 octane is the octane drop over time. That's also why I don't make a lot of mix at a time, don't want it sitting around too long.

Right, some of the lighter ends in gas, which makes for eaiser starting is where the higher octanes of the blend are. Most later saws will hold pressure in the tank and prevent evaporation but earlier grub screw vents let air move both ways. A tight sealing mix container goes without sayin.

 

[sunfish]

How about the gas ? The service guy said that I should use 95 octane because higher would be too "dry", any thoughts about this? From what I know so far the higher octane the better, so why would he say that?

Higher octane is not better, it's just higher octane. :msp_smile:

 

[D&B Mack]

What is a self supplier? Never heard of that term.

One that refines their own fuel, BP, Sunoco, Mobil, etc.

Places like, Sheetz, Wawa, Farm & Fuel (or any other convenience store turned gas pumpers) buy the lowest bid per week and generally have a 3rd party hauler. Tanks are mixed and a lot of junk can make it through the lines, QC is less.

 

[Marco]

Just try to adjust the carb:msp_unsure: new 6400 has the high epoxied in place in an aluminum tomb, quite the effort to remove.

 

[Sabertooth]

I have Tanaka perfect mix oil. 50:1= One bottle to 2.5 gallons. I use one bottle to 2 gallons.

What would that be? 45:1 or something?

 

[J.W Younger]

I have Tanaka perfect mix oil. 50:1= One bottle to 2.5 gallons. I use one bottle to 2 gallons.

What would that be? 45:1 or something?

128x2/6.4=40
40-1 unless i flubbed up.

 

[Preston]

The only station I can get corn free gasoline is a BP 18 miles away. I don't know what the octane is but it sure runs good. It's good to know they don't use middle east oil. Along with Sunoco and Conoco.

 

[Sabertooth]

Just got back from cutting from a little wood with the 5105. Just noticed how it came alive recently. I'm impressed on just how high it revs, the little saw is a speed demon compared to my 359s. Which I believe only runs at 9000 RPMs.

 

[paduroiul]

Hi

I've wrote a list of things I've learned so far about chainsaw and I would like to hear your opinion, if there's something incorrect or if you have some extra suggestions, please let me know

 

[mountainlake]

Someone told me that I run a chain saw full out. ( Compare to him. I'm a small guy) I know what you mean, but I like to work em in easy. At least 3 to 5 tanks. They don't run full power, so I don't work them that way.

I'll run mine easy at first also, everything in the motor is tight creating exta heat. Wide open yes but no long hard cuts. Steve

 

[SawTroll]

Just got back from cutting from a little wood with the 5105. Just noticed how it came alive recently. I'm impressed on just how high it revs, the little saw is a speed demon compared to my 359s. Which I believe only runs at 9000 RPMs.

That's just the theoretical max hp rpm, max free rpm is 13.500 if memory serves.

 

[Preston]

Hi

I've wrote a list of things I've learned so far about chainsaw and I would like to hear your opinion, if there's something incorrect or if you have some extra suggestions, please let me know

I just read you points, which I didn't do, but how do you turn the "blade" over for even wear?

 

[paduroiul]

if on my blade it is written "Dolmar" when I turn it the writing will be upside down, the blades have holes for the chain oil on both sides, so you can use it only if you turn the blade on the other face or if you turn it around or upside down, I don't know which is the correct expression but I think you understood what I want to say

 

[Ambull]

I removed the cat on my 5105. It lowered the heat output greatly. Somewhere on AS there is a thread about it. I went in through the exhaust port hole and busted it out with a screwdriver. Not too bad, took me about an hour IIRC. I then ground off the trim tabs on the carb with a Dremel. When the saw runs a bit richer, it gains some power in the cut.

Enjoy your saw.

 

[Preston]

if on my blade it is written "Dolmar" when I turn it the writing will be upside down, the blades have holes for the chain oil on both sides, so you can use it only if you turn the blade on the other face or if you turn it around or upside down, I don't know which is the correct expression but I think you understood what I want to say

I do now. It's just different expressions in different places mean different things. To me the "blade" is the cutting part of the chain. What you're turning over I thought to be the bar. But now I know what you meant and on we go. :msp_biggrin:

 

[paduroiul]

ok then...You didn't say anything about the other stuff I've wrote, does it sound ok to you?

 

[SawTroll]

ok then...You didn't say anything about the other stuff I've wrote, does it sound ok to you?

Delete (min 2) and replace with (about 10) at the beginning of the document.

Replace blade with bar or guide bar.

 

[paduroiul]

what can you tell me about the gas? recently some people told me that gas with higher octane than 95 are not recommended for chainsaw, it runs too dry or something. any opinions?

 

[Preston]

Around here what we call regular gas, that's a grade of gasoline, is 87 octane. If you get octane up where your talking about that is getting into aircraft gas. I run the 87 octane without the corn in it. I don't think that's something you have to contend with. I really don't know anything about the "dryness" of higher octane. All my small engine run on ethanol (corn) free gas. :msp_smile: