Cause of the < 1 yr old BR350 loss of power?

80 MLS of 2 stroke oil to one gallon of fuel and it doesn't matter what octane, of course the higher octane is better cause it burns cleaner. To much oil will gum up your carburetor and engine.

if its 2 cycle the mixture can be several mixes. it should say on the machine. here are the following mixtures that I have- 16-1, 1 gallon of gas to 8 ounces of oil. 32-1, 4 ounces per gallon. 50-1
3 ounces per gallon and 100-1 2 ounces per gallon . most of my 2 cycles are 50-1. hope this helps.

Two cycle engines run on a mixture of gasoline and oil. Each engine type is designed to run on a specific gas-to-oil mix ratio.
IMPORTANT: Use only oil that is labeled for use in "Two-cycle" or "Two-stroke" engines. Home Depot and other stores now have "premixed fuel" of gas and 2 cycle oil.
To mix two-cycle fuel, start by putting correct amount of oil in gas can. Then slowly add correct amount of gasoline. Do not try to mix gas and oil directly in gas tank of equipment.

IMPORTANT: Do not use any fuel that is over 30 days old. Do not mix more fuel than you are likely to use in a month. Old fuel can gum carburetors and prevent starting. Always use fresh fuel.

The chart below shows correct amount of oil per gallon that each mixing ratio requires. Expect that yours will be between 32 gas to1 oil and 50 to 1. 32:1 and 50:1 are most popular.
Ratio GAS:OIL UNITED STATES OIL per 1 U.S. GALLON Gasoline
(128 oz.) *INTERNATIONAL OIL per 1 IMPERIAL GALLON Gasoline
(160 oz.) *INTERNATIONAL OIL per 1 LITER Gasoline
(metric) 32:1 4 oz. 5 oz. 31.25 mL 40:1 3.2 oz. 4 oz. 25 mL 50:1 2.6 oz. 3.2 oz. 20 mL

hello sir, the gas / oil ratio is, 3/4 o/z per quart or 2.6 o/z per gallon of two cycle oil, any two cycle oil will do,this is how i mix mine and never had a problem,it is a good mix.hope this helps,don't forget the 4 thumbs up,any comments welcome,thank you. ~~

Buy 100LL AvGas, cannot burn in auto or saw fitted with catalytic muffler. No ethanol. $6 per gallon last time I bought any.

You can also try here, supposed to be ethanol free (40:1 available too):
http://www.50fuel.com/
Problem here is it is about $18 per gallon. HTH
Lou

Trick racing fuel also claims to be ethanol free if you can find it. Problem here is it shares a pump with ethanol laced unleaded. Probably 2 gallons in hose and pump and it is about twice the price of normal gas. Buy and pump 2 gallons into vehicle to get 1 gallon for saw.

I use AvGas. It keeps one season with Stihl 2-cycle oil (contains stabilizer). Any left come spring goes in mower. HTH
Lou

go to your hardware store and ask for some 2 cycle 50:1 oil, mix that with a gallon of gas and you're good to go. Before you mix, make sure that you read the oil container for it's recommendations! You can purchase a small container of oil that is all measured for 1 gallon of gas

Yours is not a current model and I did not find a manual. The following is an excerpt from a 26cc MightyLite Blower/Vac UT08550/UT08951 "Operator's Manual":
This product is powered by a 2-cycle engine and requires pre-mixing gasoline and 2-cycle lubricant. Pre-mix unleaded gasoline and 2-cycle engine lubricant in a clean 1 gallon container approved for gasoline.
Recommended fuel: This engine is certified to operate on unleaded gasoline intended for automotive use.
Mix Homelite Premium Exact Mix lubricant with gasoline according to the instructions on the package. If Premium Exact Mix lubricant is not available, use a high quality synthetic 2-cycle engine lubricant, mixed at 2.6 oz. per gallon (US).
Do not use automotive lubricant or 2-cycle outboard lubricant.
NOTE: Premium Exact Mix fuel mix will stay fresh up to 30 days. DO NOT mix quantities larger than usable in a 30 day period.
PREMIUM EXACT MIX (50:1)
GasolineLubricant
1 gallon (US) 2.6 oz.
1 Liter 20 cc (20 ml)

1 quart fuel:3/4 ounces of oil = 1 Gallon fuel:3 ounces of oil or slightly less than 43:1. Not what a current manual recommends.
If properly adjusted your blower will operate fine on 50:1 regardless of what the manual reads. HTH
Lou

Yours is not a current model and I did not find a manual. The following is an excerpt from a 26cc MightyLite Blower/Vac UT08550/UT08951 "Operator's Manual":
This product is powered by a 2-cycle engine and requires pre-mixing gasoline and 2-cycle lubricant. Pre-mix unleaded gasoline and 2-cycle engine lubricant in a clean 1 gallon container approved for gasoline.
Recommended fuel: This engine is certified to operate on unleaded gasoline intended for automotive use.
Mix Homelite Premium Exact Mix lubricant with gasoline according to the instructions on the package. If Premium Exact Mix lubricant is not available, use a high quality synthetic 2-cycle engine lubricant, mixed at 2.6 oz. per gallon (US).
Do not use automotive lubricant or 2-cycle outboard lubricant.
NOTE: Premium Exact Mix fuel mix will stay fresh up to 30 days. DO NOT mix quantities larger than usable in a 30 day period.
PREMIUM EXACT MIX (50:1)
GasolineLubricant
1 gallon (US) 2.6 oz.
1 Liter 20 cc (20 ml)

If properly adjusted your blower will operate fine on 50:1 regardles of what the manual reads. HTH
Lou

50:1 mixture. Trimlite, Trim 'n Edge, and EasyReach models.
Pre-mix unleaded gasoline and 2-cycle engine oil in a clean 1 gallon container approved for gasoline.
Unleaded gasoline. Mix Homelite Premium Exact Mix oil with gasoline according to the instructions on the package. If Premium Exact Mix oil is not available, use a high quality 2-cycle engine oil, mixed at 2.6 oz. per gallon (US). Do not use automotive oil or 2-cycle outboard oil.
Homelite manuals are quite hard to find. I'm sorry that I can't help you with that.

Hi a safe fuel mix is 25:1 but most homelites run a mix of 32:1 either one should be ok