Removing outdrive

[achris]

Re: Removing outdrive

Does anyone see a problem with that acetone atf, pb blaster, then heat combo?

Hmm.... Acetone and then heat.. I can see that ending well.... :facepalm:

 

[nemo2011]

Re: Removing outdrive

The upper case holds the shaft so their is no play. Everyone I have ever taken apart has the same amount of play...

Ok that went well replaced the base,impeller .housing gaskets & o rings.then I looked up into the upper housing and where the splined drive goes in I pulled out a mashed (I suspect a rubber o ring with a SS spring.
Here I go again is this much of a undertaking to pull shaft and install new o rings and is there anything else that should be replaced.
I can do most of this stuff but manual refers to special tool this and special tool that, which I don't have is there a site that shows you a workaround for these tools?

 

[Fishermark]

Re: Removing outdrive

Good news? Very easy to do.

The o ring you can toss. Mercruiser did away with the o ring at the top of the driveshaft as it caused more problems than it solved.

The seal is easy to replace as well. Simply pop out the old one and tap in a new one.

Here's one I took out of an old outdrive compared to a new seal. There was a little bit of corrosion involved. The size difference is an optical illusion.

You can access it from the front of the outdrive:

 

[ziggy]

Re: Removing outdrive

You can access it from the front of the outdrive:

or you can access it from inside the upper too when the lower and upper are separated. access from two points. very nice...

yep, pretty easy to replace. i used a block of wood to tap the new one in.

 

[nemo2011]

Re: Removing outdrive

Thanks for that guys! I managed too pull the lower seal with a make shift seal puller using some all thread rod nut and washer and vise grips and a beater!
LOL it worked, now back to the supplier for a new seal is it necessary to wipe the outside of the seal with locktite as the manual states?
One more thing is it advisable to freeze the seal for easier installation?

 

[Fishermark]

Re: Removing outdrive

i used a block of wood to tap the new one in.

Hey Ziggy - I seem to remember a recent post where you said you SMASHED it in.... or BANGED it in.... or something like that. Enough to make Don concerned!


Nemo - I always put a little sealer on the outside of a seal before installing it.

 

[nemo2011]

Re: Removing outdrive

Ok the new seawater pickup pump is installed cleaning up oil seal receptacle and water intake cover. just a few pictures of this work!Also a picture of old seal!!
where does the o ring on the lower drive shaft fit in relation too the bottom,upper housing oil seal?and the manual still says too install this o ring!

 

[Fishermark]

Re: Removing outdrive

I don't have the reference right now, but I know they changed their mind regarding the o-ring. In fact, later models didn't even have the groove for the o ring. In your picture showing the lower unit, the o ring is already on the driveshaft.

Also...

You want to take the copper water pipe out and stick it back up in the upper first. The plastic sleeve in the water pump helps you align the copper pipe into the water pump housing when you slide the halves together.

 

[ziggy]

Re: Removing outdrive

Hey Ziggy - I seem to remember a recent post where you said you SMASHED it in.... or BANGED it in.... or something like that. Enough to make Don concerned!

, yep, i had to retype a few times as i was having a hard time not using the word smashed... tryin not to rile folks up ya know...

agreed, leave the oring just under the splines off. i've not had mine on for several years now. no ramifications. i think of it this way. if i were to get a new lower drive shaft. it would come less the oring groove. then i wouldn't even have the option.

You want to take the copper water pipe out and stick it back up in the upper first. The plastic sleeve in the water pump helps you align the copper pipe into the water pump housing when you slide the halves together.

he can't, he the op don't have the water pocket cover in place... ... wow, good thing ya got all them bolts out of it. they love to break off. after the water pocket cover is back in place, for sure. put the copper pipe in the upper first.

 

[nemo2011]

Re: Removing outdrive

thanks for the tip re the copper water pipe. the bolts holding the water pocket cover were not corroded too badly I was very careful removing those! BTW the gasket looks really good clean up and leave it or replace?

 

[achris]

Re: Removing outdrive

....BTW the gasket looks really good clean up and leave it or replace?

Replace it, and the cover itself! For the cost of a few of dollars you risk cooking an engine. If that gasket leaks (or the cover has even the slightest warp), the cooling system is invaded by exhaust gas and the engine overheats.

As for the 'O' ring on the driveshaft. If you put it on the driveshaft and then install it there is a 90% chance the 'O' ring will hook the seal lip and hold the seal open, allowing water to get into the very area you're trying to stop it getting into. There was a bulletin many years ago about it. As already stated, the new shafts don't even have an 'O' ring groove.

Chris......

 

[nemo2011]

Re: Removing outdrive

Ok after installing the new kit in the seawater pickup pump I was going over the installation everything looks alright except when I went to turn the drive shaft I could not turn it by hand but could with the aid of some cloth and pump pliers on the splines end.
Is it normal for the pump to be this tight after new kit is installed? and is there a way too check the pump for leaks
I torqued the housing bolts to the lower scale of the torque range!

 

[vandentr]

Re: Removing outdrive

Ok after installing the new kit in the seawater pickup pump I was going over the installation everything looks alright except when I went to turn the drive shaft I could not turn it by hand but could with the aid of some cloth and pump pliers on the splines end.
Is it normal for the pump to be this tight after new kit is installed? and is there a way too check the pump for leaks
I torqued the housing bolts to the lower scale of the torque range!

Nemo,

This is normal due to the new impeller/cup install you performed - and you can see why the impellers are almost instantly destroyed if there's no water getting to 'em. A rubber impeller + rubbing on the metal cup - water = melting rubber!

-TVB

PS: Pressure test the unit via the oil ports (drain/fill) at 15psi. It should hold practically indefinitely...

 

[nemo2011]

Re: Removing outdrive

thanks Tom!
I am now looking for parts too make a pressure/vacumn tool and will test as soon as this is complete.

 

[achris]

Re: Removing outdrive

thanks Tom!
I am now looking for parts too make a pressure/vacumn tool and will test as soon as this is complete.

http://forums.iboats.com/showthread.php?t=233546&p=1573330&viewfull=1#post1573330

 

[nemo2011]

Re: Removing outdrive

Thanks Chris!
Can one just do a pressure test or are they equally (pressure,vacuum) important
pressure tester I can build cheaply vacuum another story.

 

[achris]

Re: Removing outdrive

Thanks Chris!
Can one just do a pressure test or are they equally (pressure,vacuum) important
pressure tester I can build cheaply vacuum another story.

Pressure test is checking that oil can't get out, vacuum test is checking water can't get in...
I consider a vacuum test as more important.