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Is there any way to make a 16hp CCKA into a 20hp CCKB? I am looking for a little more power out of my 616, and don't really want to sell it for something else. I've heard that it's just a carb/manifold swap. Thanks!

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Pretty much, To accomodate the carb/manifold change the the air cleaner & flywheel shroud changed & The charging systems are different (not to mention intake valve guide seals too). I've done it to quite a few units. JP

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you mean that you can gain 4 more hp with these changes. onans i know nothing about.are the piston the same the 16 & 20? and the bore the same? i'm not trying to be smart about this.when i see something that interest me i ask alot of questions. jj

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JJ, The terse description Jim (JP) gave is correct. The CCK-A/CCK-B short blocks' components are identical. The flywheels went from aluminum to cast iron. The intake/induction system was really where the extra four ponies came from (a retrictive Zenith down draft carb VS a high flow Carter side draft carb). Tom (PK)

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