Hi!

After a medium start (the only problem was bad transition) with the MVVS .45 (blue head) with 3 months flying and no major problems, lately it has been a TRUE HELL!!!

In my beginning I used a 11X7 prop, but recently I have changed to a 10X6 since I was always destroying the prop tips of the larger 11".

I now use a 10X6 prop and ProSynth 2000 ( I have been told by the shop owner that only has synthetic oil, and later on I read in a forum it has 17.5% content according to a test made by a chemist since no one seems to find out the true oil content of it).

The engine is hard to start;
If I raise the idle it will run OK but at a high idle it is difficult to land. If I set a good idle it always stops after I land!!!
Did I forgot to say that transition still absolutely SUCKS!!!
It chokes a lot and I have had a lot of dead-sticks.

No one seems to be able to set the high end needle correctly, not even those with more experience.

My questions are:

Should I return to the use of a larger prop?

Is it that important to use Castor oil in MVVS engines and a minimum 20% of total oil? Will I see a major improvement if I change my fuel to Castor?

Should I change the idle needle setting? It still is at the factory set 1,2 mm.

Please help me!!!

Nuno
Portugal