Diag outdrive failure

[randy2112]

Re: Diag outdrive failure

I found the problem... The lower is shot! Grinding crunching and locking up are the words I would use when trying to describe what happens when turning the lower units prop shaft!

I have a lower unit coming tomorrow and hope it is good... For 200.00 I am crossing my fingers... Pay Pal buyer protection better help if it isn't...

Now for future searchers...

To remove the lower you have to disconnect the shift wires behind the engine.
With the drive tilted up pull the shift wires through the gimble housing.
Tilt the drive down then unbolt the five bolts on the top of the drive. Be careful the lower unit will fall off if you aren't supporting it.
Now with the lower portion unbolted from the cap. Lower it enough to pull the shift wires through the upper unit.
That's it...
Now take this to a workbench and remove the six bolts by the cavitation fins.
remove the water pickup strainer screw.
remove the exhaust fin and the plate under the fin that the water pump pick up hose is attached too. Just pull the plate away from the housing.
Then you can see the seventh bolt above the water pickup tube. I removed the tube to get to this bolt.
Now the lower will come off the intermediate piece.
Very easy. No need to mess with the pivot caps and seals or mark ball gears!

 

[randy2112]

Re: Diag outdrive failure

The water pump in the bad lower is fairly new can I swap the whole water pump housing to the new lower unit?
Also there was a spring sitting under the gearhead cap where the dipstick goes into the gearhead what is this for?
It wasn't attached to anything it was just sitting on top of the hole for the dipstick...

Thanks

 

[Redrig]

Re: Diag outdrive failure

The impeller is in the bottom portion of the UPPER , no impeller in the lower. ,While you have that all apart though , definately change the impeller for a new one and grease the splines on the vertical shaft.

that spring that you are referring to is for grounding , so that the whole outdrive is grounded for the elcetric shift purposes.

 

[randy2112]

Re: Diag outdrive failure

Thanks... The water pickup tube goes into a big housing looking thing that bolts to the lower unit so I assumed that was the water pump housing.

Also I thoght I would mention that the disconnect for the forward shift wire behind the engine wasn't insulated! So The "slipping I felt before the drive failure may have been that exposed connector shorting on the exhaust housing causing it to slip in and out of gear under load causing my drive to self destruct. Assuming it can come out of gear under load... So as part of your general inspections you may want to check that the sleeves that insulates the connecters is in place.

 

[randy2112]

Re: Diag outdrive failure

Just wondering... Can you tell if a lower unit is good on the bench? Everything feels smooth and easy to turn. Prop and imput shafts turn seperatly and easily. When I put 12v to the forward/reverse coils the input and prop shafts lock together. I am waiting on seals so I cant just throw it together and test it yet. So far it is looking good for a 200.00 unit!

I pulled the seals and I don't know if the piece in the pick is part of the old seal or is it supposed to be there?
https://dl.dropboxusercontent.com/u/42617308/lower unit pic2.JPG