Hi all, I Thought I would put my two cents in about the Revmaster R2300 as I
have one of these in my kr2, When I'm not working on it trying to figure out
the bugs, when its running right it is a great engine, after about 18 months of
playing with it I am now getting 140 kts cruise and 1200 fpm climb at gross ,
so that i think is pretty respectable, and can now not stress to much on it
performing properly. But the problems I have had with the engine at times I've
been ready to burn the plane! thinking I would never get this thing right. A
few times in the early hours of it flying it I had to do emergency 180 turn
backs on climb out as the engine was not going to make the full circuit, with
CHT's going through the roof at 300 deg C+. (screen only only goes to 300 got
there in about 10 sec from take off, and EGT's 950 deg C+. (last flight when
the heads finally cooked). a list of the faults I had with it are. 1/ ign.
timing set at approx 40 deg btdc, which cooked the heads within 10 hrs from
new (timing was factory set!) with a timing light shown it was correct at the
prop flange, but found it a with dial ind. on piston #1 while stripping the
engine down. 2/ aluminium push rods 6 out of the eight failed in 40 hrs, now
replaced all with steel ones (rod ends crushed into the alloy tubes) and yes
they were rubbing on the push rod outer tubes . 3/. oil leaked out like a sieve
every were since new, can never seem to get one to take up from out the back of
the engine, 4/. constantly lapping valves particularly the exhaust valves, 20
hours ago had the heads professionally ground and re seated and just recently 3
exh. valves started leaking again and had to re lap (about 2 hours ago). and
feels like i am adjusting tappets every 5 hours. temp figures:- CHT's on
average in climb approx 180-190 degs C., 140-150 deg C in cruise 90-100 on
descent.EGT's around 680-720 deg C, in climb and about 600 deg C. in cruise.Oil
Temp about 60-70 deg C, pending on day temp.So the engine does run pretty cool
and I am running only on 98 unleaded fuel, no ethanol. (cant afford AV gas over
here or justify it.The engine now has 130 hours on it (with 500 hundred hours
spent working on it!)And as I said earlier when its going properly it does
perform very well, but the quality of manufacture does let it down! Or mine
must have just been a Friday build.
