Johnson Dt-10 Gearcase removal question.

[wanderlustjake]

I have a replacement gearcase and driveshaft for my DT-10. Do I have to pull the inner driveshaft casing and water tube, or should the gearcase come loose after loosening the clamp bolt? Manual is unclear (to me) if the tubes need removed to get the gearcase loose. Calls for special tools S-260 and S-261. I loosened the bolt, tried wiggling with large channel locks, no movement, I don’t want to force anything and cause more problems. Thank you

• This topic was modified 4 years, 5 months ago by wanderlustjake.

[Buccaneer]

It’s been quite a while since I worked on mine, but from what I remember, and from
looking at the parts diagram……
-Remove the exhaust snout, gear case prop shaft cap, unhook the water line from the pump, and remove the water pump assembly,
and remove the “through bolt” holding the gear case to the drive shaft tube.
Tap the gear case down and off the driveshaft tube with a block of wood and hammer.
It seems like it’s a little tricky not to bend the water discharge tube, so be careful.
Other’s may have better advice, or memory!

Prepare to be boarded!

[wanderlustjake]

Thank you again Buccaneer. I wanted to ask, double check that I’d don’t miss something. That water line looks like it will be tricky. It’s soaking with wd-40 now. Hopefully bthat and a heat gun will help.

[wanderlustjake]

Making progress. I discovered that by grinding the points of a 1″ spade bit, it fit perfectly to remove the nut holding the driveshaft casing. Once that was done and I scraped away some of the carbon and gunk, I was able to push the casing tube down and tap the gearcase free without damaging the water line. While tapping it free, the pin that holds the pinion gear at the correct height appeared.
Pretty happy now.

[Buccaneer]

Sounds like good progress, keep up the good work!

Prepare to be boarded!

[wanderlustjake]

Do you know if there is supposed to be sealant at the driveshaft casing tube and top but joint? When I pulled mine apart I noticed a red sealant on the tube…

[Buccaneer]

It certainly wouldn’t hurt to put some kind of sealant on the tube, if for no other reason
to keep corrosion out of the joint so it will come apart easier next time.

Prepare to be boarded!

[wanderlustjake]

I am now wondering if I should seal it or put some never seize on it since it was on the threads too. I wonder if that’s what they were trying to accomplish?

[Buccaneer]

I use the Indian Head Shellac type sealer on a lot of threads. I guess anti-seize
will react if used on the wrong metals, causing seizing, but perhaps is takes
100 years…….. have no idea!

Prepare to be boarded!

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