[NSRCA-discussion] Engine problem

[Buff Miller]

John,
 
 On the 91AC, the liner is threaded and screws into the head.  A spanner
wrench will do the trick to separate the two.  Check the four spanner slots
at the base of the liner.
 
Buff
 
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From: nsrca-discussion-bounces at lists.nsrca.org
[mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of John Ferrell
Sent: Saturday, August 26, 2006 11:25 AM
To: NSRCA Mailing List
Subject: Re: [NSRCA-discussion] Engine problem
 
The head & cylinder are all one part on the YS91AC. I was unable to remove
the liner when the head was sent out for the helicoil. It is stuck pretty
good. I can see a cascade of problems if I try to replace that part alone.
Considering the price of a new engine I am reluctant to spend a lot on this
one!
Hopefully, someone will suggest a simple fix.
 
John Ferrell    W8CCW
"My Competition is not my enemy"
http://DixieNC.US
----- Original Message ----- 
From: William <mailto:flyinbill1 at bellsouth.net>  C. Harden 
To: 'NSRCA Mailing List' <mailto:nsrca-discussion at lists.nsrca.org>  
Sent: Saturday, August 26, 2006 10:48 AM
Subject: Re: [NSRCA-discussion] Engine problem
 
I suggest that you buy a replacement head because that is the only item you
need.  In the future, if you have a stripped glow plug thread in the head
then simply replace the head and avoid this kind of problem.  The heli coil
method works, but it is better in my opinion to have a new head.  A new head
really doesn't cost that much.  
 
Bill
 

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From: nsrca-discussion-bounces at lists.nsrca.org
[mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of John Ferrell
Sent: Saturday, August 26, 2006 9:44 AM
To: NSRCA Mailing List
Subject: [NSRCA-discussion] Engine problem
 
General engine problem
I have a YS91AC that runs fine but leaks fuel around the glow plug.
It appears that the plug is not square to the head casting so the 
copper gasket does not completely seal the joint. 
 
Before I take the problem to my machinist son-in-law are there 
any suggestions as to how I might resolve the problem?
 
History:
Bought engine at deep discount with damaged threads and had 
Clarence Lee install helicoil insert. The first owner was full scale 
engine mechanic so I expect the problem was from the factory.
 
New YS110 is listed at $329, new head-cylinder/sleeve about $150.
My personal threshold is not to spend more than 1/3 the price of a 
new replacement in repair parts. 
Ideas?
 
John Ferrell    W8CCW
"My Competition is not my enemy"
http://DixieNC.US

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