Linkage Adjustments

catman977

Seaman Apprentice
Joined
Jul 7, 2020
Messages
43
Hi Everyone I have a 1990 Evinrude 70hp 3 Cylinder inline, that jumps out of Reverse. I'ave readjusted the linkage for it to be in netural and seat the balls on the engine adj. Is there something I'am missing.? I made it worse, last time out I couldn't get it to stay in reverse a all.
Thanks for any help.
 

racerone

Supreme Mariner
Joined
Dec 28, 2013
Messages
37,818
Did this happen suddenly ?----After water pump work?-----Has the shift rod height been checked ?-----Checked gear oil ?
 

catman977

Seaman Apprentice
Joined
Jul 7, 2020
Messages
43
Thanks for you quick reply. The last trip out this spring, early April it jumped out of reverse a few times before we pulled in. This last weekend is the first I had it back on the River since then. Before I hooked up to it, I readjusted the linkage, thinking I needed to do it in Netural and with the Engine shift in neutral I adjusted the shift cable to the Seat for the Balls on the threded rod, until it just fit in the socket, and clamped it down. Yes I did have the Lower Unit off last Winter and refurbished the Seals and water Pump. I dodn't recall changing the Shift shaft height but that may have happened. Can I adjust it by pulling the pin on it and make it work with out dropping the Lower Unit again? It's like I need a Longer Stroke on the Shifter to make it stay in gear.
THanks Again
 

saltchuckmatt

Commander
Joined
Jul 19, 2019
Messages
2,640
When the LU was off you might have spun the linkage. There is a certain height it needs to be.

Others will know that height.

Also learn how to connect the shift/throttle cables correctly.
 

catman977

Seaman Apprentice
Joined
Jul 7, 2020
Messages
43
Hi Guys Thanks for the reply's.. Yes I had the LU off for new Seals and Water Pump. Anyone know the height of the rod and how and where is it measured from? If its the Deck Flange that bolts to the Engine, can it be measured on the outside? I recently purchased a supposedly a good used LU, but haven't done anything to it yet. I will probably reseal the gear case, and new pump and seals on top. Guess I need to pay attention to the Shift rod also. I do know a lot about the linkages, as I tore into the control box several times trouble shooting, and replacing nylon washers and worn parts.
 

catman977

Seaman Apprentice
Joined
Jul 7, 2020
Messages
43
Hi Guys Thanks for the reply's.. Yes I had the LU off for new Seals and Water Pump. Anyone know the height of the rod and how and where is it measured from? If its the Deck Flange that bolts to the Engine, can it be measured on the outside? I recently purchased a supposedly a good used LU, but haven't done anything to it yet. I will probably reseal the gear case, and new pump and seals on top. Guess I need to pay attention to the Shift rod also. I do know a lot about the linkages, as I tore into the control box several times trouble shooting, and replacing nylon washers and worn parts.
I did some more research on google for the Shift linkage rod adjustment heights. It says using a shift rod gauge P/N 389997 the rod height is 21.38" or 543 mm plus or minus a half turn to align the attachment yoke. I don't have or can buy this guage, but would like to know if the measurment is from the center of the hole, on the attachment yoke , to the Deck, or top of the rod to the deck?
 

Chris1956

Supreme Mariner
Joined
Mar 25, 2004
Messages
27,840
See if you can get it adjusted properly. If not, the shift dog/gears could be worn. Make sure you have a solid forward. You can milk your way thru reverse, if need be. Remember reverse should only be used at low speed. if you need it at high throttle to pull your butt out of trouble, you have not planned your approach, at least IMO.

I had an old Fat Fifty. I could get neutral and one gear, due to worn linkage (J/E are the "kings" of linkage, BTW) and worn gear/dog mating surfaces. I chose forward as my gear of choice and was real careful when docking/beaching etc. It is really not that much of an issue, once you get used to it.

Gears/dog were $300 ea for a 30+ year old motor, at that time. I thought that out of line, and if you ever had a Fatty, you would agree.

Of course, in those days we had water skis that had only the front binding and the real Salom toe piece. The rest had fallen/rotted off. So only two pieces of rubber holding your feet to the ski. So, when ready to ski, yell "hit it", and when the boat takes off, jam the ski on your front foot, drag the other one, and do a deep water start. Once up gingerly put your toe in the rear binding, or you will kick the ski off. Surprisingly, once up on those two pieces of rubber bindings, skiing is pretty normal. Off the subject, sorry.
 

racerone

Supreme Mariner
Joined
Dec 28, 2013
Messages
37,818
Using the 21.38" dimension could cause you grief and cost you a lot of beer tokens.-----Best find the correct dimension for you motor !!!!
 
Last edited:

tphoyt

Lieutenant
Joined
Jun 10, 2010
Messages
1,256
That’s the number I came up with as well but without a factory manual I’m never 100% sure.
There are charts on line.
Try looking for J&E shift rod height charts.
 

catman977

Seaman Apprentice
Joined
Jul 7, 2020
Messages
43
Hi Guys Thanks for the input. I do a lot of River Fishing on the Missouri River and Beach my old Pontoon a lot on the Sand Bars. Sometimes I beach a little hard, and it makes it tough to break away from the beach. The Last time out It would't stay in the reverse gear to pull off the Bar. When I got it back to the shop, I decided to check the linkage adjustment. This is where I made it worse, I put the shift lever into netural and checked the bottom shift rod at the motor. I unbolted the keeper off the socket balls and re adjusted until a perfect fit into the pockets. Next time I went out to put in the River, it wouldn't go into reverse at all, without me holding the linkage rod back with a big screwdriver. Now I'am thinking of placing it all in reverse Gear, and readjusting the rod so there's some pressure on the Shift shaft to see if that works. I may have to pull the gears apart and replace the shift Dog.
See if you can get it adjusted properly. If not, the shift dog/gears could be worn. Make sure you have a solid forward. You can milk your way thru reverse, if need be. Remember reverse should only be used at low speed. if you need it at high throttle to pull your butt out of trouble, you have not planned your approach, at least IMO.

I had an old Fat Fifty. I could get neutral and one gear, due to worn linkage (J/E are the "kings" of linkage, BTW) and worn gear/dog mating surfaces. I chose forward as my gear of choice and was real careful when docking/beaching etc. It is really not that much of an issue, once you get used to it.

Gears/dog were $300 ea for a 30+ year old motor, at that time. I thought that out of line, and if you ever had a Fatty, you would agree.

Of course, in those days we had water skis that had only the front binding and the real Salom toe piece. The rest had fallen/rotted off. So only two pieces of rubber holding your feet to the ski. So, when ready to ski, yell "hit it", and when the boat takes off, jam the ski on your front foot, drag the other one, and do a deep water start. Once up gingerly put your toe in the rear binding, or you will kick the ski off. Surprisingly, once up on those two pieces of rubber bindings, skiing is pretty normal. Off the subject, sorry.
Thanks Chris. Yes I'am an old Skier and had a 20' Rayson Craft with a 440 Chrysler Magnum Engine. It would pull 7 Skiers and give them all they wanted. Miss that old Boat.
 

catman977

Seaman Apprentice
Joined
Jul 7, 2020
Messages
43
Using the 21.38" dimension could cause you grief and cost you a lot of beer tokens.-----Best find the correct dimension for you motor !!!!
Hi racerone Yes your probably right. I will experiment with the shift linkage first then the rod height. In the old'n days, seems like there was a count on the number of turns of the shift shaft after a rebuild of the LU. But I'am most likely a lot older than most here, and they wouldn't remember that. Ha
 

catman977

Seaman Apprentice
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Jul 7, 2020
Messages
43
All you beloved boaters, Thanks for all your support, I love all of you. May you all have many happy boating experiences.
 
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