remedial engine question

[Brian Young]

Wonder if the crank was undersized on the engine to
begin with? 

I have seen a similar problem with another product
when the press to the bearing isnt adequate.


--- David Harmon <K6XYZ at comcast.net> wrote:
> This same thing happened to me with a 140-L.
> The engine would screech occasionally and there was
> an rpm loss so I
> knew something was binding up.
> Turned out to be the rear bearing locking up and the
> inner bearing race
> was skidding on the shaft. The shaft had to be
> replaced because the
> bearing race wore the shaft OD so small that a new
> bearing would wobble
> when I reassembled it. The old bearing felt and
> looked new.
> This happened really fast too, so don't run you
> engine until you replace
> the bearings and inspect the shaft.
> 
> Regards
> 
> Dave Harmon
> NSRCA 586
> K6XYZ at comcast.net
> Torrance, Ca.
> 
> -----Original Message-----
> From: discussion-request at nsrca.org
> [mailto:discussion-request at nsrca.org]
> On Behalf Of Anthony Romano
> Sent: Monday, August 25, 2003 7:54 AM
> To: discussion at nsrca.org
> Subject: remedial engine question
> 
> Hi all,
> Have an RX with about thirty flights. The second day
> out I noticed a
> squeak 
> when turning the prop for restart. Thought something
> was hitting the 
> spinner, checked all that and it stopped. Yesterday
> heard it again and 
> noticed the bearings feel a little rough. Now hear
> is the weird part
> does 
> this only when hot. When cold feels fine and runs
> great. I plan on
> pulling 
> it apart tonight and changing bearings but pretty
> disappointed at the
> short 
> life.
> 
> Any one have similar experience?
> 
> Anthony
> 
>
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=====
Brian Young
Tulsa
b4598070 at yahoo.com
918-745-6046h
918-838-0900w

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