Zflyer Posted April 6, 2022 Share Posted April 6, 2022 I have a Saito 62 and looking for a manual. Anyone know which one to use the FA62a or FA62b. There has to be a difference? Quote Link to comment Share on other sites More sharing options...
John Wagg Posted April 6, 2022 Share Posted April 6, 2022 Don't take this as gospel but I have read that the "A" has a plastic backplate and the "B" has an aluminium one. ? P.S. Nothing to stop someone fitting a "B" backplate to an "A" engine though. Is this of any use :- https://www.horizonhobby.com/on/demandware.static/Sites-horizon-us-Site/Sites-horizon-master/default/Manuals/SAITO_Small-Medium_single_cylinder_Manual.pdf Cheers. Quote Link to comment Share on other sites More sharing options...
Zflyer Posted April 6, 2022 Author Share Posted April 6, 2022 Thanks John. I have downloaded that manual. There is a metal back plate on mine. I am begining to think that there was no A designation until the manufactured a sliht;y uprated version and assigned that a B. If that makes any kind of sense. Quote Link to comment Share on other sites More sharing options...
Martin Arnold 1 Posted April 6, 2022 Share Posted April 6, 2022 The 62A and B have a metal back plate, it was the early 72A and 82A that had the plastic back plate the later B's were metal. The main difference between the 62 A & B is the cam housing the A has the original lower style where as the B has the higher profile one that the cam drops into. Quote Link to comment Share on other sites More sharing options...
Glenn Stevenson Posted April 7, 2022 Share Posted April 7, 2022 This my Saito 62B Quote Link to comment Share on other sites More sharing options...
Denis Watkins Posted April 7, 2022 Share Posted April 7, 2022 Yes the housing, and, Revised parts – Crankcase, Engine Gasket Set, Cam Gear Housing and Cam Gear Shaft. Quote Link to comment Share on other sites More sharing options...
Martin Arnold 1 Posted April 7, 2022 Share Posted April 7, 2022 (edited) 2 hours ago, Glenn Stevenson said: This my Saito 62B Pretty sure that is a 62A, the B has a different crank case like this below. Is that a second crank case breather on the rear cover ? Edited April 7, 2022 by Martin Arnold 1 Quote Link to comment Share on other sites More sharing options...
Glenn Stevenson Posted April 7, 2022 Share Posted April 7, 2022 Looking at the new engine on just engines, I think you are right! Glenn Quote Link to comment Share on other sites More sharing options...
Martin Arnold 1 Posted April 7, 2022 Share Posted April 7, 2022 And the crank case breather ? Quote Link to comment Share on other sites More sharing options...
Zflyer Posted April 7, 2022 Author Share Posted April 7, 2022 Yep looks like mines a B. Has the high cam cover and crank breather Quote Link to comment Share on other sites More sharing options...
Martin Arnold 1 Posted April 7, 2022 Share Posted April 7, 2022 (edited) No it's a 62A, the same as Glenn's with the older type cam housing. Edited April 7, 2022 by Martin Arnold 1 Quote Link to comment Share on other sites More sharing options...
Zflyer Posted April 7, 2022 Author Share Posted April 7, 2022 Yep its an A. I read the caption on the picture incorrectly. Quote Link to comment Share on other sites More sharing options...
Glenn Stevenson Posted April 7, 2022 Share Posted April 7, 2022 Crankcase breathers were on it when I got it, previous owner must have broke the carb support on the backplate and replaced it with one off different engine. Quote Link to comment Share on other sites More sharing options...
Martin Arnold 1 Posted April 8, 2022 Share Posted April 8, 2022 Right, it perhaps might be a good idea to block the rear one off, the reason for having the breather at the front is it will force oil through the caged rear bearing and into the cam gear area on it's way out. Having the second breather on the back plate will just allow the oil to take the path off least resistance, probably through that rear vent and not directing the lube to the front of the motor. There are a lot of Saitos with the rear vent only and they all run fine, however the majority of later engines have the front vent set up for the above reasons. Quote Link to comment Share on other sites More sharing options...
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