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B43G In 1984 318 Quit In The Middle Of Mowing.

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#1 jbp OFFLINE  

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Posted July 28, 2014 - 11:53 AM

have a John Deere 318 with a b43 G engine that quit on me as I was mowing last time. I had the engine overhauled about 200 hours ago. When I first had it done I had a problem with the overhaul Kit's cam bearing that was half the width of the factory bearing. somehow the bearing came out of place and the engine stopped running similar to what it has now but not exactly. This time the engine was running at full speed and it started to make a slight noise for a few minutes before it stopped running. In any event my question really is this, if I dare into this engine can I rely on this group to help me get through the repair with questions I may have?
Thanks JB
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#2 GTTinkerer OFFLINE  


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Posted July 28, 2014 - 12:20 PM

Welcome to GT Talk.


I am sure someone will be along shortly to help you out. 

IMHO, you got about 199 hours more than many folks get out of a Onan engine, never liked them and don't see that changing anytime soon. 

$500 carburetors spoiled them for me.

#3 crittersf1 OFFLINE  


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Posted July 28, 2014 - 12:29 PM

Onan :(

#4 KennyP ONLINE  



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Posted July 28, 2014 - 06:41 PM

I love them! I'm sure we can help you muddle through a rebuild!


Here is a service manual. It's for a B48G, but they are basically the same engine!

#5 JDBrian OFFLINE  


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Posted July 28, 2014 - 07:11 PM

Those engines are highly regarded by many. What seems to have soured folks is the high price and limited availability of parts. At this point in time many of these engines have a lot of hours on them and even the well maintained ones are getting long in the tooth.  You can at least carefully disassemble it and figure out what happened. If it's that cam bearing again then you need a better solution this time around. A properly rebuilt engine should go for 1000hrs if looked after.