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Please describe "that ring"Because the.problem does not show up until that ring is installed. Older crossflows do not have that problem just the ones with that ring.
You would have thought if pressure back rings were a bad design they (evinrude,yamaha,johnson,etc) wouldn't still be using them today.One thing for sure,ring breakage is common on crossflows.??----Just draw a picture of the " pressure back " ring in a groove !-----Then visualize what happens to SIDE CLEARANCE when piston / ring / cylinder wall wears.-----Then draw a rectangular piston ring in a groove.-----See what happens to SIDE CLEARANCE when piston / ring / cylinder wall wears.
Its original,I bought it in 79, Ran on 89octane or higher ,E/J,oil,turner every year.I would take your 100 hp motor and put it on display. You probably have one of the only high ring ones left. How do you not know the upper ring is shaped like a wedge???? Didn't I tell you to google the rest????
You would have thought if pressure back rings were a bad design they (evinrude,yamaha,johnson,etc) wouldn't still be using them today.One thing for sure,ring breakage is common on crossflows.
No,but have held most of them in my hand.other than diameter and that i think yamahas taper is differnt,whats not the same?Have you drawn the PICTURE of the OMC pressure back rings ??----They are not all the same !
Im not missing it ,I agree totaly. Racer said it was a bad design,I was wanting to know why he thought the ring was a bad design.right now i dont care. End of post.Yamaha are looper motors. What you are missing is this happens in the V4/V6 OMC crossflow motors. Not the smaller crossflow or the looper motors. I believe you about your motor I would put it on display.
Now I have a question, Who is still using them. J/E are the same company and cross flow production stopped in 1998. I don't remember Yamaha using them maybe I am wrong about that.You would have thought if pressure back rings were a bad design they (evinrude,yamaha,johnson,etc) wouldn't still be using them today.One thing for sure,ring breakage is common on crossflows.