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

From: David <odin@...>
Date: Wed, 17 May 2006 17:36:54 -0500

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 Wednesday, 17 May 2006

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