I have noticed that my brand new Stihl runs kinda weird on 87 octane compared to higher octane stuff. I’ve rebuilt my fair share of small engines that were run on anything from 87 octane to 115 octane fuels, and what I’ve seen is that the higher the octane, the cleaner the combustion chamber, and piston are. A gasoline with a higher octane rating will produce less BTUs when burned than a lower octane gasoline.
Some pro saw users don’t realize that low octane fuel not only reduces a pro saw’s performance, but can damage its engine. The only thing you really need to know about octane is today’s pro saws need fuel with a minimum octane of 89. An even better way to store a saw engine is to remove the fuel as described, and then partially fill the tank with a product like 50 Fuel.
To start, both Stihl and Husqvarna recommend the use of high octane unleaded gasoline. Both brands of pro saws are designed to burn fuel rated at 89 octane or higher. Most regular grade fuel has an octane rating of about 87.
I cut almost everyday, as I run a tree service, I run mid grade 89 octane mixed at the 50:1 that STIHL recomends on the bottle. They all have come back to the plain vanilla mix of mid grade gas mixed at 50:1 All this being said the company VP that makes race gas and other fuels has a new product called SEF, I would try it if it does not cost much more than what I do now. They also have the gas pre-mixed at 50:1 for use in 2 cycle engines…..
98 octane in chainsaw Related Question:
Should I use high octane gas in my chainsaw?
Chain saw powerheads are high performance engines. They produce more power per pound than many race car engines — and they need high octane fuel to do it. Some pro saw users don’t realize that low octane fuel not only reduces a pro saw’s performance, but can damage its engine.
What octane gas is best for chainsaws?
STIHL recommends that customers use a minimum of 89 octane fuel. If a customer chooses to use a 91 or 93 octane fuel, no damage to the engine will result. However, using an 87 octane fuel could lead to serious engine damage.
Can I use 93 octane in my chainsaw?
Hi Octane gasoline does not run hotter, as most people think. It actually runs cooler. Using 93 in the Poulan, won’t hurt it, but it won’t help it either. In fact it may cause the exhaust port and muffler screens to carbon up quicker, due to the lowered temperature.
Can you use 98 octane?
Those numbers – 91, 95 and 98 – are the so-called ‘octane rating’ of the fuel. They’re all about the same in terms of the energy in the fuel. It can’t hurt your engine if you use a higher octane fuel. So, for example, if you use 95 or 98 in an engine designed for 91, that’s OK.
What octane gas should I use in my Husqvarna chainsaw?
Be sure to use 89 octane or higher unleaded fuel. For best results, use Husqvarna brand two-stroke engine oil that if FD certified. Always mix gasoline and oil in a clean fuel container, not in the chainsaw’s fuel tank. Fill half the amount of gasoline to be used.
Can I use regular gas in my chainsaw?
If you’ve put straight gas in the fuel tank, don’t start the engine. If straight gas is used, it can damage and ruin the piston and crankcase within a minute, as the gas doesn’t take long to burn out these sensitive parts.
What fuel do STIHL chainsaws use?
Using the right type of fuel is critical in the safe and efficient operation of your STIHL equipment. Most STIHL gasoline-powered equipment runs on a 50:1 mixture of gasoline and 2-cycle engine oil. Knowing the proper way to mix your fuel is the first step in keeping it running strong and long.
Should I run non ethanol gas in my chainsaw?
However, when you’re using gas with ethanol mixture in your outdoor power equipment, like lawn mowers, chainsaws, trimmers and leaf blowers, you run the risk of engine damage and incurring costly repairs. You should be using ethanol free gas in your small engine outdoor power equipment.
Can you use avgas in a chainsaw?
Switched to AVGAS 100 a year + ago and the lawn mower and chainsaw love it! No more starting problems and they run with full power. Just a few pennies more per gallon and its worth it, by a whole bunch, not to have engine problems.
What happens if you mix 95 and 98?
While this is unlikely to cause major damage to your car, the RAC recommends sticking to the octane recommended for your vehicle. This will ensure efficient performance and avoid engine damage. A spokesperson for the AA said: “Mixing the 95 and 98 octane fuels will not cause any problems.”
What happens if you put 98 instead of 95?
It won’t hurt your engine if you use a higher octane fuel. For example, if you use 95 or 98 in an engine designed for 91, that’s fine. However, avoid using a lower octane fuel than the minimum recommended by the manufacturer. Using 91 in an engine designed for 95 or 98 is potentially destructive.
Are all 98 petrol the same?
If your car is designed to run on a lower octane fuel, you won’t notice much difference when filling up with 98. It’s unlikely to improve your car’s perform, fuel economy, or emissions.
What happens if you run straight gas in a 2 stroke?
Without lubrication, it’ll cause high friction, causing heat and causing metal filings from the piston rings knocking around, and losing a seal. In a way, oil counteracts all of these. If it’ll still turn over, flush the fuel, and put in the correct mixture of petrol and oil.
How long can a chainsaw run on a tank of gas?
What is the runtime of a Chainsaw? Depending on the type and usage, you can expect a gas Chainsaw to run between 15 and 40 min before you have to fill it up again. Most battery-powered chainsaws have a run time of up to 2 hours, but there are high-capacity power packs that will last much longer.
What is the best fuel for two-stroke engines?
Any fuel type between 87-octane and the 92-octane will work just fine depending on the type of motocross bike you own. If you own a 4 stroke, for example, the 82-octane works just fine, but for a 2-stroke, you should go for the ethanol-free higher octanes (92 and 93) because the lower octanes tend to detonate.