2-Cycle Premix Gasohol Seperation

[NoWingsAttached]

I noticed my Motor startin hard. It occurred to me to push the gyro back and forth a few times to slosh the fuel around in the tank, thinking some various fluids had striated in the seat tank.

Seems to have done the trick, started and ran quite well after being shaken - not stirred.

Perhaps give the old girl a few shakes to mix things up before flyin, if she's been sittin a few days friend. Like a can of paint.

Just an observation.

[NoWingsAttached]

I am beginning to wonder about Pennzoil synthetic blend. I had just switched to using that, 40:1 in my Arrow, and after a few hours it ran too hot and blew a head gasket. Then, after returning from our local PeachState PRA chapter meeting up in Cedar Town, which is about 26 miles north of my home airport, I noticed a sudden loss of power as I was doing a helicopter taxi around the far end of the runway. Next time out, the following Saturday, I stayed in the pattern for 45 minutes. After lunch, I flew VERY carefully over pastures and wide open spaces only, and yep - as I applied power to climb it went BLAAAAHHHH. Turned for home and set her down, let the Hirth cool off and then went through the fuel system and checked compression etc. I decided to try another takeoff before heading to the house for the day, and it didn't even make enough power to get off the ground. Seems like a stuck ring.

This was after using Pennzoil for just 3 hours in this motor (Bite your tongue about Hirths here, please), which probably has a good 300 trouble-free hours on it, and when I did a carbon buildup check on it this spring the pistons were as shininy and clean as new. I had never used anything but the Blue Max Hirth oil prior to this. And I always use fresh fuel.

I used a bit of the mix in my leaf blower, which has only been used a few hours total. It won't idle, it started very hard, and barely ran when the motor was cold.

Three strikes these guys are out, I will never use Pennzoil Synth blend again. Never.

[NoWingsAttached]

Can't wait to get my Yamaha 4-stroke built.

[GyroRon]

I use that oil by the gallons in all my two stroke stuff, even my racing dirtbikes, never had a issue. Better look at the fact that your flying a Hirth buddy! Don't blame the oil

[scottessex]

I always use Avgas and amzoil mix for my 2 stroke yard equipment. Runs great and smells nice too.
I run 93 octane car gas 5% ethanol in the gyro, but drain it every 2 weeks.

[NoWingsAttached]

Originally Posted by GyroRon

I use that oil by the gallons in all my two stroke stuff, even my racing dirtbikes, never had a issue. Better look at the fact that your flying a Hirth buddy! Don't blame the oil

When you pour it, is it cloudy or clear blue? This oil was shockingly cloudy, but I used it anyway. That doesn't seem right, does it to you? I mena, one motor I can blame the motor, two I can blame bad luck. But three motors in a row acting up as soon as I used this?

[GyroRon]

Blue.... I always pour the oil into a ratio rite measuring cup, then into the gas jug, then fill the jug with the fuel. Used alot of this oil in my 582 and 618 powered dominators... use that oil now almost exclusively in my 800cc hopped up jet ski for the last 4 years..... and I use that oil alot in my dirtbike and almost exclusively in my 2 stroke lawn tools. Not had a single problem with using that oil. If your oil is coming out of the jug cloudy, then there is a problem with that jug of oil.

[automan1223]

If you got 300 hours out of a Hirth engine, that needs to go in a museum or something.....

Are you sure its actually a hirth ?

J

[NoWingsAttached]

Originally Posted by GyroRon

Blue.... If your oil is coming out of the jug cloudy, then there is a problem with that jug of oil.

Yeah, that's what I thought, but never having used it before, I thought maybe it was all cludy like that. Bummer. I wonder what could have mede it cloudy like that?

[CLS447]

Some one is trying to sabotage you ! I just wanted to use that word !

Ron, your jet ski........what is hopped up about it ?

Brand, size, work done to it ? Top speed ?

[GyroRon]

ignition, tuned exhaust, and a slew of pump mods

[All_In]

I have little experience with two-cycle engines on aircraft!!

What I find confusing is that Nicolas of Aviomania Aircraft and many other Europeans have experience running Hirth engines to TBO without any problems.

How is this possible?

[Passin' Thru]

Originally Posted by NoWingsAttached

Yeah, that's what I thought, but never having used it before, I thought maybe it was all cludy like that. Bummer. I wonder what could have mede it cloudy like that?

.............

Water!

[gyronutjoe]

I use an ethanol stabilizer in my fuel for 2 and 4 stroke engines. Have been using Star-Tron (Starbrite) and Sta-Bil which seem to work fine. Now I'm testing Lucas flex fuel stabilizer, E10, E15, E85 on the bottle.
With ethanol what the stabilizers do is keep the water in suspension instead of letting the water settle out to the bottom of the tank. Engines don't run well with water. Ethanol is some nasty stuff. It can dissolve certain rubber components as some rubber seats in carbs, O rings or seals. I have seen it etch steal needles in fuel floats, attack aluminum carburetors some parts will turn dark gray leaving a gray gooey stuff that will plug fuel lines. Sometimes it will create jelly like beads/gue that requires carbs to be dissembled and cleaned.
Try this, Get a small clear jar add some ethanol fuel, leave it uncovered and watch it turn cloudy. this is its ability to suck water out of the air. Non-ethanol fuel doesn't do this.

I deal with Ethanol problems all the time in my business.

[Aviomania]

Originally Posted by All_In

I have little experience with two-cycle engines on aircraft!!

What I find confusing is that Nicolas of Aviomania Aircraft and many other Europeans have experience running Hirth engines to TBO without any problems.

How is this possible?

Good oil, good fuel (98 octane) and good maintenance schedule........ do not run the engine till it brakes down... do the scheduled maintenance, Hirth engines are not so forgiving as Rotax