9.5 jumps out of gear at high speed

[imported_sportster]

My 9.5 jumps out of gear at high speeds. It does ok at 1/2 throttle. It just "goes into neutral" at wide open. What is it??? Thanks

 

[OBJ]

Re: 9.5 jumps out of gear at high speed

Welcome aboard sportster!

A question.....or two...

Does it go back into gear when you throttle down or when it jumps out, does it jump back in and sounds like your hitting a log in the water?

Have you had the lower unit of lately?

 

[imported_sportster]

Re: 9.5 jumps out of gear at high speed

No, it jumps out & stays out. I can hold the gear lever down & run it & it works ok.. I've replaced the water pump this summer. My manual is a 1967 Johnsonthat came with the motor. Not much help with troubleshooting.

 

[WillyBWright]

Re: 9.5 jumps out of gear at high speed

Sounds to me like classic shifter/gear cog wear. Could just be an adjustment issue, but few get that lucky. Could also be a worn shifter cradle which is a significant possibility. But in most cases, the cogs that engage the shifter (clutch dog) to the gear round-off and lose enough engagement surface that the shifter is forced back to neutral under load. The cure is a new shifter and forward gear. Nothing minor.

OBJ is praying for a spun hub in the prop. Hope for a Christmas miracle.

If this suddely began after the water pump, then an adjustment would be in order. It may not be shifting fully into forward. Get it fast if that's the case and you'll avoid the condition I described above.

 

[OBJ]

Re: 9.5 jumps out of gear at high speed

Yeah.....what Willy said. Hoping for the Xmas Miriacle.

How soon after the pump change did it start jumping outta' gear? Kinda' hoping maybe the shift rod connector isn't engaged all the way. (nuther miracle)When you put the lower unit back on, did you make certain that the shift rod was far enough into the shift rod coupler so that the retainer screw engaged the notch in the end of the shift rod?

What's the gear lube look like? See any sparklers in it?

Spun hub woulda' been nice....huh Willy?

 

[ezeke]

Re: 9.5 jumps out of gear at high speed

First possibility = CLEVIS, shift rod adjustment - see "lower unit" group diagram.

Second possibility = Standard CONNECTOR. - see "gearcase group" diagram.

Third possibility is gear.

The fact that you can keep it in gear by holding the shifter down suggests that you may be able to correct the problem by adjusting the shift rod connector [2] properly.

The screw has to be completely removed in order to reconnect so that the grooved section of the shift rod is captured by the screw on each of the upper and lower shift rods.

If that is not the reason for the problem, assure that the shift rod adjustment CLEVIS [1] is set such that the shift rod makes a full movement fron top to bottom.

If 1 and 2 are OK, replace the damaged gear.

Use the 1968 diagrams at the BRP site if you don't have a parts diagram - the 68 and 67 are virtually identical:

http://epc.brp.com/default.aspx?brands=ej&lang=E

BTW, it is often less expensive to find a used gearcase from a salvage yard or Ebay. I would put the value of a used 9.5 lower unit at </= $100. US + shipping.

 

[imported_sportster]

Re: 9.5 jumps out of gear at high speed

Thanks to all. I know what to look for now!!!!!I"m thinking it has to be something to do with the shift rod from all the above info, since, that was the only thing I messed with when I changed the pump.. Have a Merry Christmas...