Magnum DZ fuel
 

Don,

I have been using Magnum DZ fuel for both my 140 and 160 DZ for about 1-1/2 years now, and have had trouble with carbon forming at the valves. After about 40 flights, the engine will run slower and slower, and eventually, I had to send it to Verano for decarbonization.

According to Buzz at Magnum, he isolated the problem last year, and changed one of the addictives. The engine ran fine for a while, but started to develop the same symptoms again. Verano have just repaired a 160 for me and mentioned there were carbons on the valves again.

I understand you are also using the same fuel, hav eyou notice any problem?

Thanks in advnace,

Adrian

RE: Magnum DZ fuel
 

Adrian,

I run mine rich. Of course one would think that would make it worse, rather than better. But perhaps it keeps the engine running cooler. Don't know. I took my engine out a couple weeks ago. It had been in the plane since last June. I probably had about 20 gallons through it (180 flights). I did notice a few good size pieces of carbon in the header cap (Central Hobbies) but after chipping away some they came out and I was able to put the chuck in and take the header off. Did not notice any carbon build up inside the combustion chamber, nor any real power loss (or power difference when I put my fresh 160 in).


Don

RE: Magnum DZ fuel
 

Don,

Thanks for reply.

I sure hope I can fix the on going problem, I'm tired of sending engines to Verano every 50 flights.

Adrian