Thats good to know, Bill. I'll make a note of that if/when I have to replace the bearings in my 60-4C. I found another bearing joint on the internet, AvidRC.com. These guys sell a huge assortment of bearings, all for $1 each. I bought a bunch of their bearings for my RC cars axles and transmissions, and so far they seem smooth and work well. I dont know if they carry engine bearings or not. I'll have to look into it.
Since I'm thinking about it, I have to ask the Enya folks here... My 60-4C has about a gallon through it now, tried several different glow plugs. I can get satisfactory performance from it, but it will not transition smoothly from idle. Either its lean and cuts out slightly on transition, or its burpy and smokey and transition is slow. Sounds as though its going to quit. If I set it between these two ''extremes'' it will still burp and gurgle. Will this engine ever transition smoothly? I've read a number of articles and reviews of this engine when it came out (the last article was a review by Peter Chinn) and they've all said that these engines ran well, transitioned good, and ran on straight FAI fuel for break-in.
I've tried several plugs, OS F, Fox Idlebar, Fox Miracle, McCoy 59. Fuel I've tried is 5% nitro / 20% castor, 15% nitro / 18% oil (80/20) byrons gen2, 20% nitro / 20% oil (50/50 cas/klotz). Props I've ran are 12x6 and 13x6 APC, both fully balanced (blades and hub). On the 12x6 it transitions rich, but it sounds better than when running on the 13x6. After revving up and back down to idle, it hangs a high idle for a moment, then drops to the burbly rich idle it seems to like. If you try throttling it before this ''high idle'' drops, it cuts out. I have the engine idling between 2700-3000rpm per the Enya instruction leaflet. The airbleed is about 2/3 closed, and to get it to idle at this setting, the throttle barrel is open about 1/4-1/3 of its travel. Any thoughts? Am I beating a dead horse expecting a relatively smooth transition? I expect some burbles, but the other day while running the engine it quit on me in an inconvenient spot. I've been running it about 300rpm rich of peak RPM.