FBoss
Key Veteran
Location: Aurora Indiana USA
My Posts This: Topic Forum | You may just have a run of bad luck here as well. The Nut coming loose and the busted fan may very well unrelated. On the nut, I guess you are using a crank lock, it does need to be torqued pretty good. In addition, when you are torquing the nut and you are at full torque hold full force for several seconds. I used to have my nut back off but haven't had one back off in a long time, use blue lock tight the red is over kill and a hassle later. If you are running too rich you'll get alot more vibes that wont help. You should not be able to hold your finger on forever, if you can you are running rich, lean it out.
Fans do on occasion get stripped out, especially if the pin has slipped. The one way bearing shaft really works good and relieves alot of stress from the starting process. Some will say switch to the new Raven fan, it has the one way built in and eliminates the whole heli mounted starter shaft. Im cheap and already laid out the bucks for the one way starter shaft so I opted to keep the old school fan (as its $6 bucks compared to, I think, $15 for the new style. If I was looking at getting one or the other (new fan or shaft) Id go with the new fan.
Yes a bad bearing in the motor could cause the fan nut to back off but I have about 30gals thru my 037, bearing is still good, so Id be looking for another problem.
I think you just have had a small run of bad luck and its 2 separate "issues". Get the motor tuned right, torque that nut good with a crank lock and maintain high torques for several seconds, keep at it, your problems are not a problem with the design or parts quality.
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