Will a 22-hole OMC boot fit on an older stringer intermediate housing?

[gallipoli]

Will a 22hole- OMC boot fit on an older stringer intermediate housing (early 70s')?

The boot clamp surface on the intermediate housing is a few circumference smaller (circumfrence) surface the

 

[gallipoli]

And will an 800 series outdrive work on an older intermediate?

And will an 800 series outdrive work on an older intermediate?

Can I put the 800 outdrive on an intermediate made for the older stringers?

The intermediate I'm working with was early 70's with a 16-hole transom seal electrict shift outdrive with tru-course steering.

My 800 outdrive is also electric shift with tru-course and it LOOKS like it fits.

And will an 800 series outdrive work on an older stringer intermediate?

.. to repeat the question above, if I use the older intermediate will the bigger 22-hole boot stretch to fit the intermediate housing or will I have to make a plug for the transom to fit the 16-hole boot?

 

[whywhyzed]

Re: Will a 22-hole OMC boot fit on an older stringer intermediate housing?

No such thing as an electric 800.
Electrics are electrics
400 and 800 are the 1979 through 1985 stringer drives, hydro or mech.

As far as 8 cyl drive to 4 cylinder intermediate: no problem as far as things all lining up.
Only issue is HIGH profile vs. LOW profile- can't change that...the cav plate on the drive has to match the hull.

I had a 1977 electric drive, and I tried fitting it onto my 84 intermediate and it fit perfect. I don't believe the pivot dimensions and ball gear reference ever really changed from 1972 to 1985.

No, the boots don't interchange - I.D. is different (requires a bigger dia. hose clamp on the int.hsg even) as well as the transom area.

 

[Boomyal]

Re: Will a 22-hole OMC boot fit on an older stringer intermediate housing?

Your years and model description are not clear and complete. The ID of a 16 screw Electric boot is the same as the ID of the later 22 screw Hydro-Mechanical and Mechanical intermediate housing boot. The OD's and corresponding cutout in the transoms are different.

I have a '75 electric shift boat with the later Hydro-Mechanical outdrive. I did not have to change the intermediate housing. If I were to get an intermediate housing to match my outdrive, it would have come with the 22 screw boot, but as the ID's are the same, I could use my 16 screw boot on the later 22 screw intermediate housing. The direction you cannot go is a 22 screw boot hull back to a 16 screw boot.

If you are trying to use an electric shift intermediate housing in a boat that originally had the latter 22 screw boot, the boot is not your problem. It is the passage way for the mechanical shift cable vs the electric wire. This to can be over come as I described above..

 

[gallipoli]

how do I determine shift type? Confirm 22-hole boot OK either size housing

how do I determine shift type? Confirm 22-hole boot OK either size housing

Thanks for the info.

How do I tell if it's electric shift, hydro or mech? As I look on eBay I'll make sure I get the right type.

The boat is a '79 with an OMC engine, 800 series outdrive (OMC 800 upper housing cap) with through-hub exhaust.

Do all the electric shifts look the same with the circle hole in the back, exhaust behind the prop and the older upper housing cap?

Boomyal, Are you sure the I.D. is close enough to fit a 22-hole boot on an intermediate that was meant for a 16-hole? After hystat said they're different I measured the clamp surface again on the two intermediates and the older intermediate (for electric shift) was definitely a few inches shorter around. It's hard to measure diameter but the circumference was different.

Will the 22-hole boot stretch down to fit the older housing?

 

[whywhyzed]

Re: Will a 22-hole OMC boot fit on an older stringer intermediate housing?

I grabbed the wrong clamp the other day ...tried to fit the 16 hole clamp on my 22 hole intermediate.... it's way off.... stretching the boot might work, but shrinking it would not in my opinion...the lip would start to fold over and we're dealing with a "rapid boat-sinking" potential area....

All the electric shifts look pretty much the same 'cept for hi/low profile obviously.

I can't see why you'd be messing with an old intermediate if you have an 800 series....

Buy the right intermediate... there's no shortage of them. I've seen 400/800 int's on ebay for $50. It's the leftover part when someone scraps a boat - they sell the engine, sell the drive...then they give away the rest.

 

[Boomyal]

Re: how do I determine shift type? Confirm 22-hole boot OK either size housing

Re: how do I determine shift type? Confirm 22-hole boot OK either size housing

Thanks for the info.


Boomyal, Are you sure the I.D. is close enough to fit a 22-hole boot on an intermediate that was meant for a 16-hole? After hystat said they're different I measured the clamp surface again on the two intermediates and the older intermediate (for electric shift) was definitely a few inches shorter around. It's hard to measure diameter but the circumference was different.

Will the 22-hole boot stretch down to fit the older housing?

Re the electric shift intermediate housing. I am using the same outdrive that you have on your '79, on my stock '75 electric shift intermediate housing.(with 16 hole boot) Every thing else looks the same out the back side of the transom.

I personally have not fit a 22 hole boot over a 16 hole intermediate housing but I was recently told by someone who should have known, that the Intermediate housing boot mounting flanges were the same diameter. I suppose that could have been bad information.

If your 22 hole boot does not fit, the rest is a moot point. It would be easy to measure if you have both. Do it with a string as opposed to a metal tape measure. If it does fit, there are two issues. One, the ES Int. Hsng will have a fine spline shaft that will not fit your larger spline coupler. You'd have to switch one or the other for them to mate. Don't go with the small spline however because they wear whereas the larger splined setup does not.

The second issue is that you would have to enlarge the shift wire passageway (which I had to do) to accomodate the fatter shift cable. You would then have to seal the cable as there would be no retainer plate to hold it in, as you now have on your stock Int Hsng.

Under any circumstance, it would be better, as Hystat said, to find a housing that was meant for your year/model. ('78 to 85?)

 

[gallipoli]

I'll go find the right housing...

I'll go find the right housing...

Thanks for all the help. I'll go find the right housing and use the right boot. The electric shift is smaller.

I have two more questions:

2 - I have a rebuilt and pressure tested electric shift drive and housing sitting here as a spare. It will fit the 800 housing and I'd have to get electric shift controls (and seal the shift cable hole) to make it work, right? They're both low profile and should be geared similar both off 230 HP GM engines.

2 - How can you tell on the outdrive whether it's full mech or hydro/mech? Does the mech. have a neutral switch on the back, and is the shift cable different? Are the shift controls different for hydro versus mech shift?

 

[Boomyal]

Re: Will a 22-hole OMC boot fit on an older stringer intermediate housing?

Shift cables are different and the converter box is different. The full mechanical also use a shift interupt do-dad which the Hydro does not.

As for telling the outdrives at a glance, the later mechanical has an anode embedded at the back of the drive just above the cavitation plate and forward of the trim tab. In that area, the Hydro Mech is just continuous painted surface.

You want to be careful. I continually see year misrepresented OMC components on ebay.

BTW, did you ever say what was wrong with your intermediate housing?
See this picture for Mechanical

http://cgi.ebay.com/ebaymotors/COMP...4QQihZ005QQcategoryZ50442QQrdZ1QQcmdZViewItem

I can't find a picture for the non anode hydro-mechanical.