Using 98 Petrol in a B&S 625 Series Mower: Is it Safe?

Krzysztof Kamienski wrote:

In Libya, in the old days, we also poured kerosene into MI-2, because JetA1 was missing. Slightly higher gas temperatures behind the turbine and that's it.

Yes, gas turbines are funny devices that can work on anything flammable, it's worse with starting it on anything, because we won't start it on diesel fuel, but you can start on propane and switch to oil and it will work. In helicopters, these are already turboshaft engines and, unfortunately, they have slightly higher requirements. They will work, but not always at such altitudes and temperatures as the manufacturer of the helicopter came up with. Higher exhaust gas temperature is also a problem. Here, I have experience only with model engines (which still have 150 kg of thrust in the highest versions) and from what I remember, the differences between the gas temperatures on fuels "certified" by the engine manufacturer were measured around 200 degrees, which at the "normal" temperature of 800 degrees is a great value. When playing with fuels outside the manufacturer's recommendations, the temperatures ranged from around 650 to over a thousand degrees, which I am sure that the engine would not survive in the long run. I melted the turbine myself once because the fuel pressure regulator decided that it would clog and the engine control unit could only do it by turning on the alarm and watching the engine melt

chromee wrote:

And how does Spanking 98 relate to a saw? Will you be ok?

The engines in the saws are already two-stroke and require you to mix fuel with oil, but this will work just as well as a lawn mower.

pla20 wrote:

Such a low octane number does not change much in the operation of modern engines

The octane number is crucial for the operation of modern engines. It won't change much for the mower, but if you poured low octane fuel into the car, after some time you would have the engine to replace because there would be nothing to repair.

pla20 wrote:

Today, most people are driven by economy, not fuel quality.

What does octane number have to do with fuel quality?

pla20 wrote:

Today, most people are guided by economics

Well, in Poland this economy is strange, save PLN 10 on refueling to spend much more in the future..

Aleksander_01 wrote:

As they say - we screw up our whole lives for money to spend on doctors in old age.

We work to pay for a house that we only need to sleep in before work. As soon as you notice it, you still have time to change it. Then you have a big house, a family, and no time to try to change.

pla20 wrote:

No one has ever lost on saving, but on extravagance, yes.

If you don't know anything about life...

pla20 wrote:

Of course, I didn't mean saving in the bank because here you can only lose

Since we're on the subject of lawnmowers - what about people buying electric mowers with the type of work S2 15min because they are cheaper, which burn after the first long mowing and the warranty is rightly rejected because the recommendations in the manual have been exceeded?
What about people who throw away the fuel filter and replace the air filter instead of replacing it for 5 zlotys, for 7 years they wash it with gasoline "because it works". What about people who change the oil in the mower once, after "reaching" and then mow on one for 4 years until the engine does not fire, even though by investing PLN 50 per year, the mower could work for several years?
There are also januzy mechanics who, instead of cleaning/replacing piston rings for PLN 40, prefer to refuel with oil up to 2T so that the engine has any compression, which saves PLN 50, but loses PLN 15 on each mowing because the mower burns a lot more?

And notice that we haven't left the topic of lawnmowers yet Shall I keep on listing how you can jew on everything and lose because of it?

pla20 wrote:

It's one thing to take care of your equipment and another to be extravagant.

But it was an economics issue...