oldfart
Elite Veteran
Location: Vancouver, Canada
| BM1
I do not know where you can get a replacement bearing, as I never have had to do so.
Ask anyone who flies with me, I have well over 4000 starts on my helis and have always used the STOCK fan and a start wand with the one-way built into it. e.g. the CN0427. My answer to anyone who has ever asked me if they should go to the CNC unit has been, "Why, when the stock one works perfectly well."
I use the start wand with the one-way bearing, because even if my engine is overly primed, or has too much fuel in the crankcase due to over filling the tank and having fuel siphon from the exhaust pressure line into the muffler and into the engine, when it kicks back on start up, the startshaft and start want that it is connected to, will free wheel backwards and now damage will be done.
So as you can see, I believe ones money is better spend on gong to a CN0427 one-way start wand then the upgrade cooling fan.
I have a lot experience over the years, with a number of different helis who have a one-way built into the clutch or fan, from Hirobo, TSK, Thunder Tiger and they ALL (just search their forums and you will find this to be true) suffer the same bearing failure issue. Any time someone tries to start engines that are overly rich (a common problem when over priming when starting in colder weather or for the first start of the day, undue stress is exerted on these bearings, and they can and will be damaged.
But I must say, that it is better that this bearing goes, as if it didn't, these undue forces would be transfered to the con-rod of the engines and they would ultimately be the component that would fail and destroy your much more expensive engine. |
...yah, that's hard to beat
