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Author Topic:   1987 Johnson 35 Throttle Problem

skred posted 07-19-2014 01:48 PM ET (US)
My 1987 Johnson 35-HP outboard engine with remote controls has what I think is a problem. When I shift into reverse, the motor goes into gear, and runs at idle. Moving the shift/throttle to increase the engine speed does nothing. I have heard that some outboards will only run at idle in reverse. I could swear the first time I took the motor out and put it in reverse (having forgotten to flip the lock lever) the motor revved normally, and the motor jumped up--as it would if one forgets to lock it down. So, it appeared as if the throttle advance may have been working in reverse. I'm putting a couple photos on photobucket showing a closeup of the linkage on the motor.
http://s216.photobucket.com/user/skred/media/ 7e7292e6-01ca-4fee-8521-e2151c3bb42c_zpsdf1134bf.jpg.html?sort=3&o=0
http://s216.photobucket.com/user/skred/media/DSC00128_zpsbcbfdedf.jpg. html?sort=3&o=1
There is a cylindrical black plastic piece with a spring around the outside of it that's mounted facing a cam plate that rotates toward the other piece. The plastic piece has a concave dish in the top of the protruding shaft, and both sides of the shaft are also dished. The plastic assembly simply pivots toward the cam assembly, but is not connected in any way to it. It's just flopping back and forth. Anyone familiar with what might be wrong, if anything?
jimh posted 07-19-2014 10:31 PM ET (US)
I am no expert on your outboard engine, but I think the throttle movement in the REVERSE direction of the shift control would be created in the remote controls, not it the engine.
skred posted 07-20-2014 09:22 AM ET (US)
Yes, the action originates in the controls up forward, but the linkage on the motor combines the gear shifting and throttle movement. As my photos show, there is an assembly (the black plastic part with the spring wrapped around it) which is simply flopping around, rotating on an attachment point at its bottom. The closeup photo clearly shows that the top of the piece where the thinner shaft arises appears to be missing a portion of its length - evidenced by the irregular surface at the top of it (broken off?). Also, there is evident at least two empty threaded holes in the engine block directly above the whitish colored cam assembly (identified by the triangular reinforcing in the casting). There is a notch in the cam piece which appears to mate with a matching "ridge" on the plastic piece, and the cam edge surface is lubricated with grease. So far, I have only been able to deduce that the plastic piece has a "plunger" action. The shaft at the top can be depressed, compressing the spring around the piece. How this all works together, I cannot fathom....
Sorry for the verbosity here, but I'm trying to solve this without involving the dealer, since I'm rapidly losing faith in his capabilities....
skred posted 07-20-2014 09:23 AM ET (US)
One correction: the motor is a 1981, model J35ELCIG.

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Author	Topic: 1987 Johnson 35 Throttle Problem
skred	posted 07-19-2014 01:48 PM ET (US) My 1987 Johnson 35-HP outboard engine with remote controls has what I think is a problem. When I shift into reverse, the motor goes into gear, and runs at idle. Moving the shift/throttle to increase the engine speed does nothing. I have heard that some outboards will only run at idle in reverse. I could swear the first time I took the motor out and put it in reverse (having forgotten to flip the lock lever) the motor revved normally, and the motor jumped up--as it would if one forgets to lock it down. So, it appeared as if the throttle advance may have been working in reverse. I'm putting a couple photos on photobucket showing a closeup of the linkage on the motor. http://s216.photobucket.com/user/skred/media/ 7e7292e6-01ca-4fee-8521-e2151c3bb42c_zpsdf1134bf.jpg.html?sort=3&o=0 http://s216.photobucket.com/user/skred/media/DSC00128_zpsbcbfdedf.jpg. html?sort=3&o=1 There is a cylindrical black plastic piece with a spring around the outside of it that's mounted facing a cam plate that rotates toward the other piece. The plastic piece has a concave dish in the top of the protruding shaft, and both sides of the shaft are also dished. The plastic assembly simply pivots toward the cam assembly, but is not connected in any way to it. It's just flopping back and forth. Anyone familiar with what might be wrong, if anything?
jimh	posted 07-19-2014 10:31 PM ET (US) I am no expert on your outboard engine, but I think the throttle movement in the REVERSE direction of the shift control would be created in the remote controls, not it the engine.
skred	posted 07-20-2014 09:22 AM ET (US) Yes, the action originates in the controls up forward, but the linkage on the motor combines the gear shifting and throttle movement. As my photos show, there is an assembly (the black plastic part with the spring wrapped around it) which is simply flopping around, rotating on an attachment point at its bottom. The closeup photo clearly shows that the top of the piece where the thinner shaft arises appears to be missing a portion of its length - evidenced by the irregular surface at the top of it (broken off?). Also, there is evident at least two empty threaded holes in the engine block directly above the whitish colored cam assembly (identified by the triangular reinforcing in the casting). There is a notch in the cam piece which appears to mate with a matching "ridge" on the plastic piece, and the cam edge surface is lubricated with grease. So far, I have only been able to deduce that the plastic piece has a "plunger" action. The shaft at the top can be depressed, compressing the spring around the piece. How this all works together, I cannot fathom.... Sorry for the verbosity here, but I'm trying to solve this without involving the dealer, since I'm rapidly losing faith in his capabilities....
skred	posted 07-20-2014 09:23 AM ET (US) One correction: the motor is a 1981, model J35ELCIG.