ORIGINAL: iflyg450
I saw this on the MECOA site for 39.00 its a MARZ - MAP3 .15 I was thinking of putting it in my sig shoestring C/L. I have never messed with Diesel engines. If its a good engine do you use pump Diesel??
You can not use pump diesel. I would suggest commercial model diesel fuel, at least until you learn to run diesels.
I have two MAP3 diesels. The one with the natural aluminum fins needed some "tweaking" to run. It had a bind that I fixed by adding a thicker backplate gasket.
It has a muffler which I removed and reinstalled upside down to maintain tolerances during break-in. This allowed easy exhaust primes during break-in.
When I first started it there was almost NO compression. Instructions said to move the contra piston down until it just touched the piston at TDC, then back off 1/2 turn or so. It worked. The engine started and compression increased for the first half dozen short runs.
I initially used a 9x4 nylon prop which the MARZ handled well, even though it is a rather short stroke engine. After a dozen or so heat cycle runs it is ready for a plane. It runs good and starts easily. What more could you ask for.
George