Hi John, 
     I have some questions regarding an 1800 Ollie gas tractor I bought late this summer. It started to show engine coolant mixing with the oil, so the guy drained the anti-freeze right away and replaced it with water. He didn't use it anylonger after noticing this, changed it just so he could start engine to move tractor out of his way on the farm yard. He pointed out to me when I listened to it run, a slight internal noise, I think he thought maybe a bearing knock. To me, it sounded too  high to be bearings, worn wrist pins / bushings I suspect.  My questions are: 1) does the 1800 series "A" have internals only unique to the "A" series, such as crankshaft and piston/sleeve sizes ?  2) What parts from the 283 cu. in. and 310 cu. in. engines are interchangeable, if any ?  
 
  I have a lead on a couple rod bearing sets, N.O.S. , one set STD. and the other is .010 under.  Haven't located any Main bearing's yet, hope I don't need any, but the fact is, it doesn't take long for anti-freeze to wipe out a bearing surface. Any advice you could provide is much appreciated. This tractor is too nice to give up on, but I'm striking out on finding a replacement engine from a 1750 or 1850, no luck at any tractor salvage yards I've contacted. What can you tell me about updates to the wrist pins/bushings ?    Please e-mail me at:  <!-- e --><a href="mailto:shortykj@alliancecom.net">shortykj@alliancecom.net</a><!-- e --> 

                                                             Thanks for any help John !
                                                                       Jim Steinberg
                                                                         Minnesota