RCV91-CD tips?
 

I just received my RCV91-CD engine. Does anyone that is running this engine have any hints or tips for me?
Thanks

RE: RCV91-CD tips?
 

They are normally a very easy to use - trouble free engine.

Just use regular 2 stroke model airplane fuel. Some people add a little castor oil.

RE: RCV91-CD tips?
 

I have the RCV 58 and I've found that you need a fuel containing a minimum of 10% nitro and an OS F 4 stroke plug. I use an all synthetic fuel called Prosynth here in the UK. This is absolutely the best fuel available for any glow engine, and especially RCV's
See http://www.westonuk.co.uk/index_045.htm

However I'm not sure that you can get it in the States. You will find that if you use a fuel containing all castor your new RCV will last about a season and will look like a toffee apple, as a couple of my friends found out !

Just make sure that you treat it carefully during the first hours running and you will be rewarded by a great running engine.

Hope this helps

RE: RCV91-CD tips?
 

Recommended Fuel 10% Nitro / 15% Oil including max 6% Castor, this is the actual fuel recommendation from the RCV site. They used to specify WildCat 10% with 18%/ 80/20 Syn/castor blend. They require a few %age points of castor to seal the rotary valve.

RE: RCV91-CD tips?
 

I just received my motor from warranty repairs, and after speaking with the repairman, who is one of the best around, his suggestion was to use fuel containing the proper amount of castor for initial break-in. (about a gallon) Then go ahead afterwards and use regular fuel with at least 18% oil, most are that anyway. The reason for this is that you only need to use the castor to help seal the valve and tighten up the motor alittle. Too much castor isn't good for these as stated above. These motors actually get tighter the more they break in. (seal up) Also if you are like me and notice that there isn't much rpm change from about 3/4 to full, it's not you, the carb is actually too big for the motor. You can also go higher on the nitro if needed or prefered to get a little more power, I use 25% morgans blend as I live at 1 mile above sea level and we generally loose about 10 - 15% power at this altd. That was also suggested by the repairman.

Tunning was easy, well I thought at first. My tune was, LSN 2-3 turns out and HSN 1 3/4 turns out. When I received it from repairs the needles were, LSN 1/4 turn out with barrel closed and HSN was 5/8 turn out. And he suggested I may need to lean both out about 1/8 turn at this altd. and he was dead on. Runs like a champ. Here is the sheet I got back with the parts he replaced and his suggestions.


Shane

RE: RCV91-CD tips?
 

P.S. the picture of the piston was only after a gallon with 15% nitro and 6% castor. Lots of build up from the castor. Not the reason it went for reapairs, that was due too the c/s bearings being reversed when assembled.


Shane