Re: [OMC-Boats] Outdrive Vintage Question

That's good to know -- so you'll be able to correctly source engine
parts. Now we just need to figure out what sterndrive you have? Have
you figured out what upper gear ratios you have yet?

But I beg to differ, as all Buick V6's with that casting number and
3.7L or 225 cu in use ODD-FIRE Crankshafts.
This was due to the fact that the engine was exactly 2/3'rds of the
Buick 300 V8. Result is a slightly rough but distinctive idle due to
the 120-degree spacing of the crank throws.
(OMC only used odd-fire Buick V6's until they switched to the 90-
degree Chevy V6 much later.)

You can read all about the technology and history of the world's first
mass produced V6 (both odd-fire and even fire) at: http://hhscott.com/evinrude/buick_v6.htm

Lee

On May 25, 2009, at 11:14 PM, BLDFW wrote:

> Hi Lee,
>
> I looked up the block casting number (1381623) stamped on my V6 and
> found it to be a 64-67 Buick V6 225. If does not appear to be an
> "odd fire' version.
>
> Also, I added a bunch of new outdrive/impeller waterpump pics on my
> photo site. You can click on the "outdrive" tag to the left to
> narrow it down.
>
> -Bill
> Dallas, TX
> 1970 Evinrude Explorer - 155 Buick V6 - OMC sterndrive
> http://www.photobucket.com/evinrude_explorer
>
>
> --- On Sun, 5/24/09, Lee Shuster (lib1) <lib1@...> wrote:
>
> From: Lee Shuster (lib1) <lib1@...>
> Subject: Re: [OMC-Boats] Outdrive Vintage Question
> To: "Evinrude & Johnson Boats of the 1960's and 70's" <omc-boats@...
> >
> Date: Sunday, May 24, 2009, 7:14 PM
>
> From the looks of things in your electrical pictures, "someone" has
> replaced your engine (not original OMC block color) which also
> explains why you can't find an OMC ID plate that is normally riveted
> on the Port cyl head near the front. It can be hard to tell which
> Buick V6 you have (the made cu in displacements of 196-225-231-odd
> and 231-even and 252-even. You'll have to check casting numbers to
> determine which block you have and then look them up on the many
> Buick V6 web sites. Let's assume for now you have a 225 odd-fire V6
> that was built by GM or Kaiser Jeep. I would be concerned (as
> perviously mentioned about an automotive water pump, because most
> shade-tree mechanics would just trade engines and not move over the
> marine-rated accessories.
>
> Beginning in 1969 OMC began using two large ROUND 10-pin electrical
> connectors, that replaced two white, rectangular Molex connectors
> and a dangerous open (hot) terminal strip. The YELLOW Round
> Connector is used to bundle 6 wires, used for Bilge pump/blower,
> Tilt Motor, Tilt Relays and Electric Shift Control. The original
> BLACK Round connector bundles 9 wires that all route to engine
> functions, like instrument sensors, starter, alternator, regulator,
> coil, essentially all engine attached devices. On pre 69 models the
> open terminal block had three heavy current wires. A Ground (Black)
> and two Positives, one Green and one Brown. The Brown was the
> Alternator output. The Green was used to feed the tilt relays and
> starter relay. Its hard to tell from the pictures how these are
> presently wired, but they don't appear to follow factory conventions.
>
> It looks like "someone" took some short cuts when they replaced your
> engine, outdrive and possible your intermediate section as well
> (with the older style electrical terminal block). The terminal
> barrier strip not present on 1969 - 1970 OMC boats is the give away.
> The also eliminated the Black round engine service connector and
> hard-spliced in the engine wiring with what look a lot like yellow
> wire nuts (could be crimp-ons, can really tell). They also did some
> rather "funky" wiring like the large red wire they have run down to
> the starter or battery to feed the tilt relays. On pre-68 mode this
> wire normally ties into the barrier strip, which apparently came
> with your older replacement intermediate section.
>
> Just curious, what color is your outdrive leg painted? Does it show
> evidence of having been repainted? (My 1970 catalog shows a navy
> blue sterndrive on the Evinrude explorer.) There are a lot of not so
> obvious differences on the older 4-bolt cap units. Since they were
> older and only made 3-4 years, vs a 10-year run on the 5-cap units,
> many parts are not interchangeable and are much harder to fine. I
> wouldn't worry as much about the condition of the ball gears, as I
> would counting input shaft to prop shaft rotations, to determine
> what overall (engine to prop) gear ratio you have. Ideally the V6 at
> sea level should run a 1.54:1.00 overall ratio, or if you want to
> count upper gear teeth you should have 25 and 25 on a V6. (lower
> gears are always 15 and 23 teeth regardless of engine).
>
> Lee
>
>
> On May 24, 2009, at 1:34 PM, BLDFW wrote:
>
>> Hi Lee
>>
>> I attached a pic of the engine compartment that shows one plug and
>> a bundle of wires that might have been a plug at one time. What's
>> that tell you?
>>
>> Also, exactly where would I find the engine ID?? I've tried to
>> find it before but not sure I'm looking in the right place. In the
>> center of the block at the top rear is a number; 1381623, along
>> with a number 5 by itself and the GM stamp. If that's not it, tell
>> me where else to look. I didn't see any stampings at the end of
>> the heads so not sure where else to look.
>>
>> Also, attached are two pics of the ball gears. Seems the gear on
>> the outdrive is more worn than the one on the transom. Is that
>> normal? In anycase, I think I'm going to go ahead and replace
>> them....or should I do only the outdrive? Thoughts?
>>
>> -Bill
>> Dallas, TX
>> 1970 Evinrude Explorer - 155 Buick V6 - OMC sterndrive
>> http://www.photobucket.com/evinrude_explorer
>>
>>
>> --- On Sun, 5/24/09, Lee Shuster <lks@...> wrote:
>>
>> From: Lee Shuster <lks@...>
>> Subject: Re: [OMC-Boats] Outdrive Vintage Question
>> To: "Evinrude & Johnson Boats of the 1960's and 70's" <omc-boats@...
>> >
>> Date: Sunday, May 24, 2009, 1:48 PM
>>
>> You have an older drive or at least one that "someone" has turned
>> into a "hybrid." I can think of other genetic terms but won't use
>> them on the family-oriented lists.
>>
>> Welcome to the world of old boats. It will be interesting to hear
>> what you find, including gear ratios. (Often times "someone" will
>> exchange a sterndrive from a different boat with different gear
>> ratios).
>>
>> Check something on the Buick V6 for me? Can you locate the engine
>> ID tag and find a model number? Does you Buick have two large
>> ROUND electrical conectors (One Yellow, One Black) located on the
>> Starboard, Aft area of the engine?
>>
>> Most likely the engine is original and the Sterndrive has been
>> replaced.
>>
>> Lee
>>
>>
>>
>> On May 24, 2009, at 12:20 PM, BLDFW wrote:
>>
>>> My Explorer is a 1970 model according to the plate on the riser.
>>> In studying the service manual as I start to dismantle the
>>> outdrive, it suggests that the outdrive is a 1967 or earlier
>>> model. The manual states;
>>>
>>> "Remove the exhaust housing cover attaching screws. On models
>>> since 1967, five screws secure the exhaust housing cover in place;
>>> prior to 1967, only four screws were used."
>>>
>>> Is it normal that a '70 vintage Evinrude would have a '67 or
>>> earlier vintage outdrive or should I assume it's been replaced at
>>> some point?
>>>
>>> Thanks.
>>>
>>> Bill
>>> Dallas, TX
>>> 1970 Evinrude Explorer - 155 Buick V6 - OMC sterndrive
>>> http://www.photobucket.com/evinrude_explorer
>>>
>>> _______________________________________________
>>> OMC-Boats mailing list
>>> OMC-Boats@...
>>> http://lists.ultimate.com/mailman/listinfo/omc-boats
>>
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>> <Wiring 2.jpg><Ball Gear Outdrive.jpg><Ball Gear
>> Transom.jpg>_______________________________________________
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>
>
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Received on Tuesday, 26 May 2009