need help with shifting problem

[yamahakeith]

i hope someone can help me i have a 1970 115hp evinrude model number 115083d ok now here is my prob i have checks both my wires the blue and green wires the solinoids are working fine they are withen specs i went out and bought a selco johnson/evinrude outboard 1958-1972 repair manual to figure out this prob. i have ok now the prob i took the boat out on the water and started to take off and it took off then just popped out of gear and i checked the fluid level and it looks fine and its full no milky tint to the gear oil so my question is does anyone know what my prob could be rev. works fine and nuetral works fine it just wont stay in gear but if you let off the throttel it will go back into gear but it is a very slow speed i hope someone can help me out thanks

 

[F_R]

Re: need help with shifting problem

Does it make a horrible grinding and jumping sound? Or is it more like slipping rather than actually coming out of gear? It would be very unusual for one of those motors to actually come out of gear and if it did it would make that horrible grinding noise, and probably wouldn't have reverse or neutral either.

I suspect you have the slipping condition instead. That is the propeller hub slipping. The cure is to take or send the propeller to a prop shop and they can re-hub it. Or, just get a new propeller.

And be very glad it's the just the prop and not actually coming out of gear, which would really cost you big bucks!!

 

[tashasdaddy]

Re: need help with shifting problem

if it feel like the clutch slipping, on a standard transmission car. the engine running faster than the movement. you have a spun prop. the prop has a center hub on the prop shaft, a rubber bushing an the outer hub of the prop. the rubber bushing has worn out, and needs replacing. in this picture you can see what i'm saying. No you can't do it yourself. clik picture to enlarge.

 

[yamahakeith]

Re: need help with shifting problem

it made a terrible grinding noise and a thumping sound im going to check the prop and if its there is the problem thanks for your help guys

 

[tashasdaddy]

Re: need help with shifting problem

with a permanet marker draw a line across the 2 sections of the hub. then give it a spin on the water. if they are still line up it's not the prop. but it sounds like it's the lower unit problem.

 

[F_R]

Re: need help with shifting problem

The terrible grinding sound means the clutch dog and forward gear are not engaging all the way, or if they are engaged they are so worn out that they won't stay engaged. Fairly unusual on that motor because they have a spring and a reverse bevel that holds them together.

At any rate, the gearcase has to come apart for inspection and repair if that's the case.

 

[yamahakeith]

Re: need help with shifting problem

ok tryed to take to take the boat i went threw the soloids and checked them and everything was within specs again so i went out to the river and started to go and this time i had no reverse and forward did the same thing kept what i would say popping out of gear so i marked the prop and went back out and it didnt move does anyone think the clutch dog could be bad just a idea i had that prob on a 60's johnson but it was also a manual shift and i wish this was also they are so much easer to work on thanks again

 

[F_R]

Re: need help with shifting problem

Ok, here's the deal. That motor is supposed to default into forward gear when something is not working. Look in your manual and you will see an oil pump in the forward nose of the gearcase. There is a piston in that oil pump that slides back and forth under hydraulic pressure as valved by the solenoids. Dirt, metal shavings, and grit can make that piston get stuck. That may be your problem.

OR, you can have other severe damage, including but not limited to the clutch dog. Such severe damage will cause metal shavings, which puts us right back to the possible stuck piston question. It's all related.

There is only one way to determine what is wrong with your lower unit. It has to come apart for inspection and repair. There is no other way.

BTW, remember way back up the thread I said that if you have damage in the lower unit you probably wouldn't have neutral or reverse either? Now you just said that you don't have reverse. I know whereof I speak.

 

[yamahakeith]

Re: need help with shifting problem

ok thank you you just gave me a direction to take im going to tare it down today monday and c what it is i can c, i am a mecanic when it comes to automotive but im not doing to hot diagnosing this prob, and i will let you guys what i find thanks again for the help i just hope its not going to break my wallet fixing it and next question is it worth it the motor has around 120 psi in all 4 cylinders?

 

[BoatBuoy]

Re: need help with shifting problem

120 psi in all cylinders is good.

Question for F_R. If the wrong oil were used in this unit, what would the symptoms be?

 

[F_R]

Re: need help with shifting problem

Sluggish shifting I suppose. I've never actually tried it. Do you suppose that is the problem here????

 

[yamahakeith]

Re: need help with shifting problem

ok well i tore it apart today and found out the clutch dog and gears was worn they was rounded off so i beleive they wasnt meshing correct i had this same problem before on a 67 johnson 60hp. so a buddy of mine sold me a 1972 evinrude 100hp parts motor and changed out the lower unit and now it works great I WOULD LIKE TO THANK EVERYONE FOR THERE HELP