New 357XP and General Questions

[River Hill]

I just ordered a new Husky 357XP and now I have some general questions for you pros. I did some searching, but I just want to confirm some of my findings. I plan on using 93 Octange gas along with MX2T oil at a ratio of 32:1. Since this is synthetic oil, which oil should I use for break in and at what ratio? I plan on running my saw very easy for the first tank or two. If I am correct in reading, all bar oils are the same and it doesn't matter which one I use. Thank you in advance. I ordered the saw with a 18" bar and plan on using the 3/8" chain that comes with it. Is the a better one that is recommended? Thank you again

 

[Weatherby]

Originally posted by River Hill
I plan on using 93 Octange gas along with MX2T oil at a ratio of 32:1. Since this is synthetic oil, which oil should I use for break in and at what ratio?

You wont go wrong with this ratio even for your break in, but if you bought this saw off the internet, the carb wont be adjusted to run at 32:1, it will be set for 50:1. An 18" bar on this saw is a good size.

Rob

 

[rbtree]

River Hill,

Based on what our resident saw builders say, when you get your saw, let it idle through 1-3 tanks of fuel. This will smooth out any rough areas from manufacture. After that, go ahead and run it normally, no babying needed.

Then, consider sending it to one of them for a full build. It will gain 35-45% in power.

 

[River Hill]

Is it ok to break it in using the synthetic? Also how do I adjust the carb to run 32:1? I have not played with two strokes too much so I will need to know what to look for. Do you think I would be better of running it 50:1?

 

[cbfarmall]

Just search the forum and you will find more answers to all your questions than you will know what to do with. You won't have to go back very far. Somewhere in there will be a link to to Madsen's carb tuning page. Here's the main page:

www.madsens1.com

Good luck, Chris B.

 

[rmcfall]

What about a saw with a fixed jet carb like the Stihl 260? Would there be problems running it with a 32:1 mix?

 

[shooter]

River Hill - If you have any concerns, probably the safest bet is to break in your new 357XP on the Husky 50:1 black bottle mix. That way if for some reason you have any warranty issues, you have followed all the recommendations of the manufacturer.

Any advantages of using MX2T 32:1 will probably show up only after some serious hours on the saw.

The reports from 2 cycle bikers are that the exhaust port & piston are cleaner.

Chainsaws probably see more variables - temperature, dirty filters, lower rpm's in the cut, etc.

I like using MX2T as it permits me to gas up multiple brands of new & old saws and the string trimmer all out of the same mix can!

Shooter

 

[Kneejerk Bombas]

Brian, why didn't you tell me that before? I sold my stihl for half price 'cus I accidently ran some husky oil through it.

Was Rb kidding about running 3 tanks of gas at an idle through a new saw?
I have heard all kinds of "break in" plans. What's the deal?

 

[rbtree]

Wobbly knee boomer,

That was 1-3 tanks.....Nope, not kidding. Ask DozerDan, Dennis or Kdhotsaw.

Got my new Cali Special 335 today, will use it stock till Dan finishes and ships my 338. My old 335 Walkerized needs help, perhaps an impulse line, which Jeff at Bailey's tipped me off to, and is sending one. Then I'll have Dan do the 7 cc larger Cali, and I can do a real comparison.

 

[shooter]

Rocky J -

What I’m referring to is the reports from 2 cycle engine sites, of using MX2T in a variety of 2 cycle pre mix applications - chain saws, string trimmers, leaf blowers, tillers, power ice augers, and in non-injector system 2 cycle dirt bikes, karts and ATV’s.

The benefits are it runs clean, stays mixed, no moisture absorption problems, low smoke.
It is compared against Amsoil, Maxima K2, Opti, and Redline products.

I have mix ratio requirements of 32:1, 40:1 and 50:1. Mixing Mobil MX2T at 32:1 covers all three ratios. Obviously, other 2 cycle mixes will provide similar results – it is my choice to use MX2T.

Mike

 

[rbtree]

shooter,

Can you direct us to some of this info, please?..or paste it here.

I'm going to switch to Mx2T also soon.

 

[shooter]

RB -

I e-mailed the info to you.

Mike

 

[Stumper]

FWIW the local Stihl dealer insists on idling a tank of gas through a saw before it goes out. I have no complaints about longevity on the saw I bought from him-but then again I never had a problem with the saws I assembled and just started using either.

 

[shooter]

River Hill

Has your new 357XP arrived yet? Again, if you plan to use a 2 cycle synthetic pre mix, the 1st tank doesn't have to be synthetic.

Actually, a break in period with a petroleum based 2 cycle oil seems to be more of a standard with other 2 cycle engine applications.

In the RC world, a standard practice has been to break in the new engines for several hours using the old Lawnboy mower 2 cycle mix to help the rings seat. Than the synthetics are run full time. The engines in the bigger planes are comparable in size & RPM's to chainsaws.

Amsoil & Klotz synthetics are popular pre mixes. Honda joins the crowd with HP2 at 32:1.

Mike

 

[bwalker]

his seized motor and kept trying to explain how it wasn't an oil related failure.

Brian, If you knew anything about two cycle motor failures you would understand that melted piston domes are not lube related. Keep on using your cheap, over priced oem oil like a mfg's lap dog. There are better, cheaper alternatives.

FWIW Idleing is a poor way to break a motor in as it takes load to seat parts and load is only accomplished through run time. I break everything in on the oil and ratio I intend to use in the machine and i dont baby the thing much.

 

[shooter]

Rocky J

Sorry, I have to disagree with you. Put aside your 20 years of experience and take 20 seconds to look at the engine info at this site:

http://www.brisonaircraft.com/pricing.htm

See any engines you recognize? That’s why the trends showing up in other 2 cycle engine applications are worth watching.

A 95 cc Dolmar in a RC plane is obviously not seeing the dirty environment or higher temperatures that the equivalent engine is seeing in a Dolmar saw, so we are probably don’t have an entirely direct comparison.

But the synthetic pre mixes are commonly used and the users are reporting cleaner engine conditions. Brison specs either Amsoil or Klotz synthetics for full time use in their Dolmar engines.

No one is knocking the Stihl or Husky 50:1 premix. The Stihl oil is an API certified TC oil and passes the tough JASCO-FC (Japanese) testing for low smoke and the ISO-L-EGD (European) certification which has an even tougher test for carbon deposits.

But the synthetics are quickly gaining a reputation for superior low smoke & clean engine performance.

Mike