jumping out of gear while moving

[gazza2007au]

hi guys my cousin has a 1973 20hp johnson we went out today and while throttling up the motor would jump out of gear my cousin said the gear selector is adjustable once adjusted it will go into forward and stay there but while in reverse u need to hold the gear lever in the reverse position or it will pop out how can we fix this problem?

i was out in the middle of the lake when this happen so i had to tie a small piece of rope from the gear lever to my wrist i know bad move if the motor goes overboard but it was the only way back and to keep the motor in gear

 

[ezeke]

Re: jumping out of gear while moving

Often the problem is that the connector between the two sections of shift rod has been replaced incorrectly. The screw must be completely removed in order to properly grasp the rod. Click the thumbnail.

 

[lindy46]

Re: jumping out of gear while moving

If it's not the shift rod out of adjustment, you have a worn clutch dog/gear. Usually it is the forward gear which gives you problems, not reverse. I'd suspect the lower shift rod is pushed too far up into the coupler. This would keep it from completely engaging in reverse.

 

[1946Zephyr]

Re: jumping out of gear while moving

If you can correct the problem after adjusting the shifter, then you're okay, but if it jumps out of the other gear after making adjustments, then it's likely the shift cradle is a bit too worn. Any more than .003 on the gap, in the shift cradle and clutch dog, then things get real sloppy.

Then again, you could have adjusted it too hard to the new position and may need to back it off a tiny bit. There isn't much leeway in those adjustments, so be careful. You can also check and see how centered your adjust ment is, by slowly moving the shift left back and forth, while turning the prop and see exactly where each gear disengages. If it likes to engage in forward gear, while the shifter is in the neutral position, then you'll know that it is adjusted too far into the forward gear position.

 

[14ftgrumman]

Re: jumping out of gear while moving

If i's a new problem, it could be the shift cradle is worn or the clutch dog is bad.
If it''s a problem that arose after some service work, retrace your steps.
As suggested- shift coupler not in properly or shift rod out of adjustment.
These are good motors- I have 2 of them. Allways looking for parts motors.

 

[1946Zephyr]

Re: jumping out of gear while moving

The clutch dog can be reversed, to where the good side is working with the forward gear, but if ithe shift cradle is sloppy, then all bets are off. These set ups are made to be adjusted, but there is a fine line between being off, or being on.

 

[5150abf]

Re: jumping out of gear while moving

Had a 9.9 with this problem, used a matchbook to hold it in gear, ended up wrecking the gears so you want to fix this soon, I would vote on a worn clutch dog.

 

[gazza2007au]

Re: jumping out of gear while moving

cheers guys i will get my cousins permission to lower the gearbox and check the gear selector joint if this is not the problem i will try to find him another gearbox

 

[bream master]

Re: jumping out of gear while moving

Ive got a 35hp 1978 mod and had the same problem as your describing.Do what EZEKE said and check the shift road connector,be very careful in what you do, and do not overtighten those bolts,just take it easy.If all else fails,you most likely have a bad clutch dog.........CHEERS.

 

[gazza2007au]

Re: jumping out of gear while moving

cheers for all the help guys i have two motors here a 15hp with cancer and the 20hp both johnos the 20hp that had the jumping out of gear problem well i got around to checking it out the linkage linking the gear push rod was ok so i pulled the gearbox apart and the gears are ok both forward and reverse but however the clutch dogs are rounded i have reversed the clutch for the time being to get some use out of the motor

 

[ezeke]

Re: jumping out of gear while moving

You might want to take a shot at this: http://cgi.ebay.com/ebaymotors/NOS-...6771657QQptZBoatQ5fPartsQ5fAccessoriesQ5fGear

 

[gazza2007au]

Re: jumping out of gear while moving

You might want to take a shot at this: http://cgi.ebay.com/ebaymotors/NOS-...6771657QQptZBoatQ5fPartsQ5fAccessoriesQ5fGear

thats a different part number mate the one im looking at on crowleys marine is 0390030 there are none on ebay also i have a question since i have the lower unit off of the motor can i turn the lower unit upside down to fill it? as i dont have a lower unit oil pump

 

[ezeke]

Re: jumping out of gear while moving

That's exactly the same part - one number supersedes the other. See the parts catalog for your specific motor here: http://shop.evinrude.com/

The easiest way to fill a small gearcase is with the squeeze tubes, filling from the bottom until it overflows out the top vent. That gets rid of trapped air and keeps from overfilling. If you overfill you can blow out the seals when it heats up.

 

[gazza2007au]

Re: jumping out of gear while moving

cheers mate very helpful what about the other question above about filling the oil?

 

[gazza2007au]

Re: jumping out of gear while moving

reversing the clutch worked a treat took the motor out today and it ran fine i did however contact a johnson dealer today in sydney australia i almost passed out when they told me the prices forward gear USD$474, clutch dog USD$141 yes those numbers are correct

 

[ezeke]

Re: jumping out of gear while moving

http://cgi.ebay.com/ebaymotors/John...85QQptZBoatQ5fPartsQ5fAccessoriesQ5fGear#shId