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Mopar boat question... for a tech

Posted By: 52savoy

Mopar boat question... for a tech - 01/27/15 09:25 AM

I need to get started on the lower unit of my 115 Chrysler. I know there a couple outboard mechanics onboard here..

Have some questions, possibly "hands on" help.
Posted By: mercman1

Re: Mopar boat question... for a tech - 01/29/15 04:30 AM

What do you need to know? I might be able to help.
Posted By: 52savoy

Re: Mopar boat question... for a tech - 01/30/15 12:13 AM

Wondered about if I really need specialized tools to service it (ie).... water pump package and seal kit.

thanks
Posted By: mercman1

Re: Mopar boat question... for a tech - 01/31/15 12:46 AM

To service the water pump no. Should take you less than an hour to R&R the impeller...as for the seals.... Take a radiator pressure tester and make an adaptor to pressurize the lower unit through the drain plug screw. (I think it is 3/8 18 thread) Pressurize it to no more than 15 psi, rotate all shafts and work shifter forward, neutral, reverse checking for pressure loss. The driveshaft and shift shaft seals are easy. props haft seals will require special tools or inginuity
Posted By: bryansgarage

Re: Mopar boat question... for a tech - 01/31/15 04:13 AM

more details of what you want to do would help.
Posted By: bryansgarage

Re: Mopar boat question... for a tech - 01/31/15 04:23 AM

Sorry ,after a re-read I saw you were doing the water pump. It's a very simple job. When you are removing the bolts holding it on , there is one hiding under the skeg fin. Wiggle the assembly down until the shaft clears. I hold mine in a old workmate table. The 4 or 5 screws come out and the cover comes up. Watch the seal ,don't scar it. The impeller has a key. re-install with the impeller twisted like the old one came out.
I've seen a couple really worn out ones and some that looked good ,replace it anyway.
Posted By: 52savoy

Re: Mopar boat question... for a tech - 01/31/15 08:52 PM

Quote:

To service the water pump no. Should take you less than an hour to R&R the impeller...as for the seals.... Take a radiator pressure tester and make an adaptor to pressurize the lower unit through the drain plug screw. (I think it is 3/8 18 thread) Pressurize it to no more than 15 psi, rotate all shafts and work shifter forward, neutral, reverse checking for pressure loss. The driveshaft and shift shaft seals are easy. props haft seals will require special tools or inginuity




I sorta figured the water pump was the easy part. I've already checked for seal leakage after I found water in the gear oil. I used a vacuum pump instead of pressure. Zero vacuum.... The seals are more than likely original so they need to go.

Got plenty of ingenuity
Posted By: 52savoy

Re: Mopar boat question... for a tech - 01/31/15 08:55 PM

Quote:

Sorry ,after a re-read I saw you were doing the water pump. It's a very simple job. When you are removing the bolts holding it on , there is one hiding under the skeg fin. Wiggle the assembly down until the shaft clears. I hold mine in a old workmate table. The 4 or 5 screws come out and the cover comes up. Watch the seal ,don't scar it. The impeller has a key. re-install with the impeller twisted like the old one came out.
I've seen a couple really worn out ones and some that looked good ,replace it anyway.




I built an outboard motor stand last year and the prop is about 8 inches off the floor. Do you think that's an issue when moving the housing or need more clearance?


thanks GUYs.....
Posted By: bryansgarage

Re: Mopar boat question... for a tech - 02/01/15 02:48 AM

Yep , the shaft is about 16 inches. I also wanted to remind you to remove the shift lever pin before trying to drop it out. It's kind of a pain realigning both during assemble ,just work it back up slow.
Posted By: BSB67

Re: Mopar boat question... for a tech - 02/01/15 03:14 AM

Why not tilt the engine?
Posted By: 52savoy

Re: Mopar boat question... for a tech - 02/01/15 06:36 PM

That was my next move..... If that doesn't work I made up a lift hook that screws on the crankshaft.

I'm not ready for the engine just yet, still restoring the interior. Got the recovered seats back yesterday and they are beautiful.
Posted By: BSB67

Re: Mopar boat question... for a tech - 02/01/15 08:16 PM

I've probably pulled 15 LUs off of various engines and stern drives, but none on a Chrysler. Done them all with some tilt as I've never had enough clearance to the floor.
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