Re: [omc-boats] Small Block Chevy V8's

From: David <odin@...>
Date: Fri, 19 May 2006 09:54:12 -0500

Thanks Lee - I printed out the models - I should not have a problem as I
kept the intermediate housing and drive for the V8 so all should be fine
- however, I just stuck them in storage along with several other drives
and housings - now all I have to do is be sure to pull the right ones
when I start putting things together - you would think I had enough
brains to mark them before I put them away - Oh well - live and learn.

lib1@... wrote:

> Bingo. That's exactly what I was trying to explain. With that
> procedure you shold be good to go. Also, be sure and change the UPPER
> final drive gears, as the V8 needs longer legs. Drive ratios are
> listed here:
> Most 307's had the 21.16 upper gears. The later Ford 302 V8's (170,
> 175, 190 hp) had slightly shorter ratios.
> ----- Original Message -----
> From: David <mailto:odin@...>
> To: omc-boats@... <mailto:omc-boats@...>
> Sent: Wednesday, May 17, 2006 4:36 PM
> Subject: Re: [omc-boats] Small Block Chevy V8's
> Thanks Lee,
> I have three sets of the wide stance motor mounts - one set from
> the V8 and two from other boats with V6's that I scrapped - and
> all are the same - so my plan was to simply mount the V8 on one
> set, slide it up against the intermediate housing and see if it
> lines up - if not, adjust accordingly when I put in new stringers
> in to hold the V8 - but I am sure pictures of what you did would
> be a big help. Dave
> lib1@... wrote:
>> Hi David,
>> All the V-4's and the early V-6's (64,65,66 and some 67's) used a
>> mounting system that employed a top-hung, intermediate housing
>> which bolted to a metal frame with two rubber isolation pucks.
>> The metal frame (at least on my Sportsman) then bolted into the
>> floor stringers and secured the two transom (lifting) eyes. Thus,
>> the early V-6's had a narrow, centered front mount, below the oil
>> pan. When the V-8's came along in 1966 (first Buick 300, then
>> Chevy 307) they discarded the transom frame. Instead they used
>> front and rear wide-stance feet that all bolt to the floor. They
>> probably felt the added torque of the V8's warranted 4-point
>> floor/stringer mounting?
>> Thus when converting to the V8, (at least on the older style
>> mount boats), this requires an increase in floor height to get
>> the transom aperature to line up as before. Study the before and
>> after pics of my installation if this all sounds a bit confusing.
>> The metal frame was removed in the "before" pics but is
>> re-installed in the "after" pics, this was not done for motor
>> support but for transom/hull/floor stringer integrity.
>> Hope this helps.
>> Lee
>> ----- Original Message -----
>> From: David <mailto:odin@...>
>> To: omc-boats@... <mailto:omc-boats@...>
>> Sent: Tuesday, May 16, 2006 8:32 AM
>> Subject: Re: [omc-boats] Small Block Chevy V8's
>> Hi Lee,
>> I would have to dig up the title for the year - but it was
>> originally a V4 2 cycle - I put a V6 in it back about 13
>> years ago - that V6 had the old front motor mount, as I
>> recall it had a few bolt holes for adjusting the drive trim?
>> and I put a large aluminum plate across the boat - 1/4" thick
>> 12" wide and bolted that to the floor then mounted the motor
>> mounts to it - it worked our very well - now with the V8, I
>> intend to pull the floor and glass in a structure to hold the
>> newer aluminum floor mount - I am assuming the engine with
>> that mount will line up? since the V6 with the old mount did?
>> but guess I'll find out about that when I work on it. Dave
>> lib1@... wrote:
>>> David,
>>> What year is your 17 Deluxe? What engine was in it
>>> originally? Just curious if it had the stern or floor mounts?
>>> Lee
>>> ----- Original Message -----
>>> From: David <mailto:odin@...>
>>> To: omc-boats@... <mailto:omc-boats@...>
>>> Sent: Monday, May 15, 2006 2:09 PM
>>> Subject: Re: [omc-boats] Small Block Chevy V8's
>>> I have a 307 from my Rogue - I pulled it and scraped the
>>> boat out - was a nice rig but I wanted the engine to put
>>> in my 17' Deluxe - it is in there now, but just sitting
>>> - not mounted etc. - no time - but it is a great engine
>>> - Rochester quad that sucks gas on the top end, but
>>> cruising was ok on gas. Dave
>>> lib1@... wrote:
>>>> Hi,
>>>> I'm curious if anyone on this list has experience
>>>> running a Chevy V8 with an OMC sterndrive?
>>>> The 307 or the later 305 or 350?
>>>> Lee Shuster

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Received on Friday, 19 May 2006

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