Norvel 061- loose venturis
 

My flying buddy and I each have a Norvel BigMig 061 (CL), which we've been using regularly for about the last 3 years. On both engines, the venturi has become quite loose and wobbly (perhaps due to the o-ring getting tired?). Has anyone else encountered this, and if so, what's the best fix?

Cheers
Steve

RE: Norvel 061- loose venturis
 

Remove it, clean it and apply silicon or rtv sealer and reinstall.

RE: Norvel 061- loose venturis
 

Check the NORVEL FAQ sticky at the top of the forum - post #18.

http://www.rcuniverse.com/forum/fb.asp?m=3759397

RE: Norvel 061- loose venturis
 

Steve,

I agree with Andrew's idea.  I have shamelessly stolen his idea from that sticky and employed it with great results in several applications.  Highly recommended!  I now use this idea in place of new O rings.  Andrew, thank you again for sharing some of your ingenious ideas with us.

Good luck with it.  I hope you get the same results I did.

Bob

RE: Norvel 061- loose venturis
 

I thought the control line venturis were all glued in at the factory with something like JB Weld? I had one of those come undone once and glued it back in.

RE: Norvel 061- loose venturis
 

CP

The early versions were glue only, but when the castings were modified for bolt-on carbs, both the R/C and C/L used the thru-bolt mount. These bolt-on venturis were included with the later AAN notched cylinder model and all the Revlite versions. They still had a sealant applied, but it was thinner than JB Weld, almost like a shellac. As it aged, when the carb was pulled, it would flake off.

andrew

RE: Norvel 061- loose venturis
 

Thanks for the replies. The strange thing was that after I removed the venturi for cleaning and reassembled it, it felt quite solid again. Perhaps the o-ring expanded a little once removed from the engine, but in any case I expect the problem will recur and I'll go with Andrew's idea.

Cheers
Steve

RE: Norvel 061- loose venturis
 

I have had great results from just replacing the o-ring with an original, and also with a slightly larger one (hardware store). This pretty much goes for all size Norvel motors.