Running a Jet Ski on Propane....

[Matt_E]

More reason for me to go Avgas.

 

[Motorheads5]

You can justify anything if you convince yourself first lol

 

[Matt_E]

It's been determined for a couple months now by Jetworks.

 

[Motorheads5]

You can run avgas in anything with a carburetor ?

 

[Matt_E]

There are a couple caveats, but generally: yes.

 

[OL JS Rider]

water that feeds the pisser would be plenty to keep a vaporizer from freezing up. Impco makes small mixers all u need is a throttle plate instead of the carb. Lpg weighs 4.24 lbs per gallon. campcyl are 1 lb ers. check teeco products and Impco.

 

[Crab]

You can run avgas in anything with a carburetor ?

Watcon reccomended one gallon 110LL to 4 gallons 92 E10 should get things back where they should be for us running 180-185 psi motors.

 

[ger87410]

This sounds to me like the diesel idea.

Those tiny 1 gallon ones won't work. I bet the small camper size tanks would work good.

Speaking of gas.
I don't know what they did to the gas I get, but it smells like crap when it burns now.

 

[redrrocket]

i cant see LP being that good for a ski.. ever shake one of those tanks and try to get your camping grill to work? the liquid propane. freezes everything.. even worse when you try to get it out fast.. the nozzle will freeze right up from the expansion. and rolling upside down the liquid would plug any regulator.

 

[The Penguin]

stop eating all that pepperoni and hard boiled eggs... :fart:

 

[ger87410]

stop eating all that pepperoni and hard boiled eggs... :fart:

Don't forget the green chile and tamales.

 

[Cannibal]

I'm familiar with both Impco and Tweeco. I checked into a propane system for offroad back when....

With propane systems, you WANT that liquid to be in the hose from the tank to the regulator. That's why a small tank may flow enough because you are evaporating it outside the canister.

With camp equipment/torch/etc you need to deliver evaporated LPG to the unit and it's not designed to accept it in liquid form and convert it.


About Gasoline:
That really sucks to have to add 20% 110 octane gas to make a "pump" gas motor run correctly.

One thing you guys might consider; checking the content of your "race" fuels and 100/110LL if you can. I've read that some of the race fuels can contain up to 25% Toluene to raise octane. I'm not sure about aviation fuel though.

If you are buying "race" fuel and mixing it, and your fuel is actually 25% Toluene, you might as well just buy Toluene and mix it with your gas yourself and save the money. Toluene has an octane rating of 114. It's a petroleum distillate just like your gasoline is.

 

[Cannibal]

Another option is to get some tetraethyl lead and add it to your gasoline

This guy claims that 3 oz of his tetraethyl lead added to each gallon of 93 octane gas will give an octane rating of 101.

But his 32 oz bottle is $21 and will do about 10 gallons, so $2/gal.

If you can find tetraethyl lead cheaper, you might be able to come up with your own mix using toluene and lead to get desired results, which is essentially what your average leaded race gas is.

Our leaded race gas here is about $7.50/gal and our 100LL at the airport is $5.30 right now.

 

[Waternut]

Another option is to get some tetraethyl lead and add it to your gasoline

This guy claims that 3 oz of his tetraethyl lead added to each gallon of 93 octane gas will give an octane rating of 101.

But his 32 oz bottle is $21 and will do about 10 gallons, so $2/gal.

If you can find tetraethyl lead cheaper, you might be able to come up with your own mix using toluene and lead to get desired results, which is essentially what your average leaded race gas is.

Our leaded race gas here is about $7.50/gal and our 100LL at the airport is $5.30 right now.

Yeah that additive sounds worse than just mixing 112 race gas 50/50 with 93 pump gas. I'm not sure what kind of gas you're quoting for $7.50 but if it's 112 octane, then for $5/gal you could get real gas with 102 octane. While using fancy snake oils, you spend $4.50 for 101 octane and probably hurt your engine more and most likely get less power.

If you read enough "educated discussions" on octane boosters, most people say that they will work but definitely not the same as race gas and really shouldn't be used indefinitely.

 

[Cannibal]

That additive (TEL) is what's in leaded race gas and aviation 100LL and what was in regular leaded fuel until it was outlawed. There's nothing wrong with running it in your engine. The eco-nazis would disagree, and you surely would not want to drink it, or get it on you for that matter (like you don't really want to get gas,oil, acetone, etc on you either).

You will find most race gas is leaded. Lead adds octane and was used as an octane booster/top end lubricator for years (since 1920s-1986).

I don't know if that guy's stuff is 100% TEL or not. Could be 50% TEL and 50% crap for all I know.

If you were to find some 100% TEL, you'd have to figure out how much to add to get what you desire. There a maximum of 2 grams/gallon of TEL in 100LL. Hardly any.

All I'm saying, is by buying "race" gas, you really don't know what you are getting. You get whatever they mix together to get to the desired octane. You might be paying crazy prices to get 92 octane gas with 1% TEL, 20% toluene, and 5% ethanol. Do you really know? If that were the case, you could probably mix your own for cheaper (and leave out that Ethanol).

So at least be an informed consumer. Otherwise you might as well bend over and tell the guy, "Fill'er up with Race gas".

Now Avgas is different and strictly monitored by the FAA. If anything I'd go with that over mystery race gas.

And the stuff around here for $7.50 is 107 leaded at the pump. There's other stuff available in higher octane all the way up to 115 for $15/gal, but it's only available in 5 gallon cans.

 

[Maxumflux]

aviation fuel is the only way to go for your $6'000 engine, but then again you are looking at 6.50-7.50 a gal here.

 

[vitalikol]

My idea of running LPgas - Kaboooom !!!

 

[Freakrider]

From Group K: ABOUT AVIATION FUELS - Aviation gasoline (or "av gas") is blended specifically for use in small aircraft. It's also commonly used by many high performance engine owners because of it's high stated octane rating (usually 100-110) and the relatively low price compared to racing fuel. Unfortunately this fuel is not all it appears to be. Avgas octane is rated on a different scale than gasoline's intended for ground level use. What is 100 octane "av", is not necessarily 100 octane "ground level". Besides this, there is also a big chemical difference. Normal ground level race fuels are made up of gas molecules that have a "light end" and a "heavy end". The light end of the molecule ignites easily and burns quickly with a low temperature flame (as a piece of thin newspaper would burn). The heavy end of the molecule is not so easily ignited, but it burns with a much more intense heat (as an oak log would). This heavy end of the gasoline molecule is responsible for the hotter, more powerful part of the combustion process.

Small aircraft are constructed as very weight conscious vehicles. That's because their somewhat weak engines often have difficulty taking off with any extra weight. To help reduce this weight problem, aviation gasoline's are blended with no heavy molecule end. This makes a gallon of avgas weigh substantially less than a gallon of ground level fuel. Since small plane engines turn very low rpms and produce so little power, the omission of the heavy end is not a horsepower issue. However, for high output pwc racing engines, there is defiantly a compromise in power. This, despite the fact that many pwc owners experience the desirable cooler operating temperatures that avgas offers. In addition, some blends of avgas will quickly separate from some oils used in premix situations. For the above reasons, we do not recommend the ongoing use of 100% avgas, and we will not prepare any "avgas" engine kits.

Despite all this bad news, running avgas (accepting the slight power loss) is usually a better choice than burning down a high output engine on regular pump gas. In this situation, the best choice is usually a 50/50 mix of pump and avgas. That provides "some" heavy molecule ends for the engine

 

[Cannibal]

Good info there. I've never heard of that.

 

[Maxumflux]

From Group K: ABOUT AVIATION FUELS - Aviation gasoline (or "av gas") is blended specifically for use in small aircraft. It's also commonly used by many high performance engine owners because of it's high stated octane rating (usually 100-110) and the relatively low price compared to racing fuel. Unfortunately this fuel is not all it appears to be. Avgas octane is rated on a different scale than gasoline's intended for ground level use. What is 100 octane "av", is not necessarily 100 octane "ground level". Besides this, there is also a big chemical difference. Normal ground level race fuels are made up of gas molecules that have a "light end" and a "heavy end". The light end of the molecule ignites easily and burns quickly with a low temperature flame (as a piece of thin newspaper would burn). The heavy end of the molecule is not so easily ignited, but it burns with a much more intense heat (as an oak log would). This heavy end of the gasoline molecule is responsible for the hotter, more powerful part of the combustion process.

Small aircraft are constructed as very weight conscious vehicles. That's because their somewhat weak engines often have difficulty taking off with any extra weight. To help reduce this weight problem, aviation gasoline's are blended with no heavy molecule end. This makes a gallon of avgas weigh substantially less than a gallon of ground level fuel. Since small plane engines turn very low rpms and produce so little power, the omission of the heavy end is not a horsepower issue. However, for high output pwc racing engines, there is defiantly a compromise in power. This, despite the fact that many pwc owners experience the desirable cooler operating temperatures that avgas offers. In addition, some blends of avgas will quickly separate from some oils used in premix situations. For the above reasons, we do not recommend the ongoing use of 100% avgas, and we will not prepare any "avgas" engine kits.

Despite all this bad news, running avgas (accepting the slight power loss) is usually a better choice than burning down a high output engine on regular pump gas. In this situation, the best choice is usually a 50/50 mix of pump and avgas. That provides "some" heavy molecule ends for the engine

it sounds like a drunk guy wrote that. there are no numbers in there just a bunch of big words. how much does the fuel weigh? and my cessna twin has no problem getting off the ground?:djsmilie:














j/k