Geoffrey Bainathsah

Hi Guys
Im having some trouble with my Moki 250 and i would really appreciate your input.
During ground test i have reaced aroun 3700 rpm at peak, but it doesnt take long and the engine shuts off due to heat.
Decided to richen her up to 3400 rpm and try a flight, but it didnt take long and the engine overheated just as as i was coming in to land (approx 1 minute)
I have found consistency at the 2900rpm mark, here the engine doesnt heat up , but this is insufficient power to take off (tried it today)

im running the moki 250 and Carf 36x16 3 blade.
After talking to CARF, we changed the prop to 36x14, with no significant change.
Oil mix 40:1

any recomendations?

All Day Dan

My Feedback: (5)

Geof, you may get more responses in the Gas Engine forum. Dan.

oldtimer4759

hi, have you tried it without the cowl, I have a smaller Corsair, ESM, with a 70cc twin, I had problems until I baffled the engine, I had to close off the front like you have, then from the front of the fins to almost the back of the fins, that way the air has to go through the fins, you have it closed off at the front between the cylinders, but maybe you need to enclose the cylinders, to make the air go all around the cylinder, the baffles need to almost touch the fins, I also had to open up as much air out at the back of the cowl as I could get.
Oldtimer