Cell Block 726
2 Wheel Todd
- Location
- Yaak, Montana
Yam 62t case half
- Thread starter Cell Block 726
- Start date
mike b
Michael "Mayhem" Bevacqua aka MikeyChan
- Location
- California
What is the difference between a 62t case bottom and a 61 X case bottom? I know the top half has the intake manifold but I have both in front of me and do not see any obvious difference.
- Location
- Braapp factory
No difference to my knowledge, but cases are machined as a matched pair ?
- Location
- California
Yes, you can’t mix and match cases. They are machined and line bored as a matched set.
Cell Block 726
2 Wheel Todd
- Location
- Yaak, Montana
Case/manifold is SOLD
Thanks X-h2 0
Thanks X-h2 0
- Location
- Lake Havasu City, AZ USA
I dont care what anybody says, in the old days I used to mix and match some Yamaha 61X 62T 6M6 top and bottom cases and never had a problem... They sealed up nicely and the crank spun freely, what more do you want? 
Would I recommend it? No,thats up to you.. haha
Would I recommend it? No,thats up to you.. haha
Cell Block 726
2 Wheel Todd
- Location
- Yaak, Montana
I do miss the old days!!I dont care what anybody says, in the old days I used to mix and match some Yamaha 61X 62T 6M6 top and bottom cases and never had a problem... They sealed up nicely and the crank spun freely, what more do you want?
Would I recommend it? No,thats up to you.. haha
I have yet to see a problem with mixing top and bottom cases. I have a mandrel that would expose an issue if there was one and I haven’t found a set yet that caused an issue. Would I build a $10,000 freestyle engine on a mixed set if I had a match on the bench, probably not unless it was a panic. That being said, let’s be honest, lots of 701 based recreational engines are a bunch of hodge podge crap anyway and stock engines are a dime a dozen. Chances are you are going to sink it and rust or flat spot the bearings on a hydro-lock before the cases are a problem anyway. If it gets you on the water and fits your budget, don’t be afraid to mix...
Cell Block 726
2 Wheel Todd
- Location
- Yaak, Montana
Well said, Thank you...
I may have recycled it a decade ago but nowadays glad there's a use for it and helps me with grocery money!!
I had a 6m6 bottom waiting for a 62t top. Im going to epoxy, port, and epoxy ramp this set. I have a ported cylinder waiting for these as well