In need of some help with a K&B .40

[andy borgogna]

I inherited a K&B 40 R/C engine that I would like to convert to a control line engine, in short replace the carb with a venturi.  But, the engine is missing a prop thrust washer.  I have a friend with a lathe and maybe he can make the washer for me but if anybody out there in cyber space has one they don't need I could sure use it.  Any other help or info would be greatly appreciated.  After running the engine through the crock pot process it appears to be in good shape and I have a plane on the board that would a good fit.
Thanks in advance
Andy

[Terry Caron]

Hi Andy - MECOA lists parts for the .40s here:
http://www.mecoa.com/kb/40/40-parts.htm
Good luck with it.

Terry

[andy borgogna]

Thanks Terry I will give them a call.
Andhy

[andy borgogna]

Just ordered the part, hope this works out.
Andy

[Terry Caron]

If it's in good shape as you say, Andy, you shouldn't have any worries.
Let us know how it runs and post pix of your build! 

Terry

[andy borgogna]

Will do Terry.  Thanks again.

[Dennis Toth]

Andy,
The K&B 40 will work fine but you need to get the right venture around a 0.275 with ST NVA through the venture (Jim Lee or Randy Smith has them see vendor's corner). They like 10% nitro and 24% total oil (50/50 ok). Don't over prop it, a 10 1/2 to 10 3/4" x 5 prop works fine. Likes to run rich 2 cycle (almost a 4 cycle). Ship should be around 52 - 56" around 48 -50 oz ish. Mine works fine with a tongue muffler.

Best,    DennisT

[Motorman]

Don't over tighten the set screws for the venturi. Put some blue loctite and just snug them or they will crack out.


MM

[Dan McEntee]

   Do a search here for this engine and posts by the late Jim Thomerson. he used and liked the K&B .40 quite a bit and liked them. I think he propped his in the 11-4 range but not sure of that. I have one or two but have never ran them.
   Type at you later,
   Dan McEntee