Re: [OMC-Boats] Sportsman 155 Engine Replacement

I run it at 6250 ft ASL using a 13 or 15-inch SST where it hits 35 - 37 mph (2-people) depending on conditions maxing RPM's at 4400.

I have run it at 3000 ft using a 17-inch SST and it turned 39 - 40 (2-people) mph.

I have never had it a lower altitudes. Lightly loaded I would expect it could swing a 19-in SST and possibly it 42-43 mph at 4200 - 4300 RPM. But the hull design really doesn't want to be pushed much farther than the low forties, as it loves to porpoise.

Remember, I have a stock Chevy 307, 210-hp which is cammed very mildly for a very smooth, slow idle and great fuel economy. It runs very smoothly compared to the odd-fire Buick and has better low-end torque, but it does have to lug and extra 150 lbs around. I've been quite happy with it, but it would be fun to try a warmed over 327-350-377-383-400-406-427 SBC someday.

Lee

-----Original Message-----
From: omc-boats-bounces@... [mailto:omc-boats-bounces@...ultimate.com] On Behalf Of Doug Julien
Sent: Tuesday, February 16, 2010 10:01 AM
To: Evinrude & Johnson Boats of the 1960's and 70's
Subject: Re: [OMC-Boats] Sportsman 155 Engine Replacement

Lee, have you ever taken your V-8 Sportsman down to sea level and put a hotter pitch prop on it just to see how fast it would go?

Just wonderin'

-Doug Julien

--- On Tue, 2/16/10, Lee Shuster <Lee.Shuster@...> wrote:

> From: Lee Shuster <Lee.Shuster@...>
> Subject: Re: [OMC-Boats] Sportsman 155 Engine Replacement
> To: "'bchowk@...'" <bchowk@...>, "'Evinrude & Johnson Boats of the 1960's and 70's'" <omc-boats@...>
> Date: Tuesday, February 16, 2010, 10:40 AM
>
>
>
>
>
>
>
> Actually if you want to stay with
> OMC sterndrives and OMC
> exhaust manifolds you have the following engine
> choices:
>
> GM-Buick:
> V6- 196-225-231-252 (the
> 231 was available in both
> even and odd-fire, the 252 is only even
> fire)
> V8- 300 (it might be possible to
> use the
> 340/350)
>
> GM-Chevy:
> Inline-4
> 153-194
> Inline-6 230-250
> V-8
> 265-283-307-327-350-400
>
> Ford:
> British Ford Inline 4
> (Kent)
> V-8
> 289-302-351-W
>
> Besides the issues that B.C.
> mentioned you also need to pay
> attention to sterndrive gear ratios when swapping
> engines.
>
>
>
>
> From:
> omc-boats-bounces@...
> [mailto:omc-boats-bounces@...] On Behalf
> Of BC
> Howk
> Sent: Monday, February 15, 2010 9:10 PM
> To:
> ohnoitsnexi@...
> Cc:
> omc-boats@...
> Subject: Re: [OMC-Boats] Sportsman 155
> Engine Replacement
>
>
>
> Hey Nexi,
>
> Yep, I have some ideas about this...if you are looking
> for a straight
> up replacement you need a buick 225 odd fire, if
> you are talking about
> the 155 in NC then you SHOULD be able to reuse the manifols
> (exhaust and
> intake), hopefully rebuild the rochester 2G, the trick
> being finding a marine
> water pump...I understand that they are built with
> different impeller material
> that stand up to lake water better (I gather an automotive
> pump would work but
> would not last like the marine version)....you CAN get the
> manifolds still but
> they are not the cheapest items you'll ever find, just
> be aware....
>
> OK, so the trick about looking for an odd fire BUICK
> V-6 is that they were
> NEVER put into BUICK's, LOL...they were put into JEEPS
> and OMC boats....so you
> are either looking for an OMC 155HP v-6 (again odd fire
> 225) or a "DAUNTLESS
> V-6" put in 60's era Jeeps (I know 69 jeepster FOR
> SURE as I used to own one :-)
> again the key is ODD FIRE 225
>
> here is a site that has long blocks, I have never
> purchased from them
> myself but if I ever decided to replace my 225 here is
> where I would
> start...
> http://remanufactured.com/Inboard_Marine_Engines.htm
>
> OK so the next stop in the geneology is a 231 EVEN
> fire buick...here
> is some history to tell you what they would be in
>
> http://en.wikipedia.org/wiki/Buick_V6_engine
>
> SO......a 231 is a less striaght forward swap,
> you'll need to be sure
> your intake and exhaust manifolds still fit and you'll
> need a new destributor
> (good news is an HEI unit should be pretty easy to come
> by)...also if you REALLY
> wanted to step up you have more options for hot rod stuff
> (like the HEI, cams,
> edelbrock makes a 4bbl intake specifically for it,
> etc)....I hesitate to mention
> this option...I would like to do it myself but currently
> HAVE NOT so I cannot be
> sure if there are any hidden "gotchas" in
> there...however from what I underdand
> an early 70's even fire SHOULD bolt right in with your
> ODD fire manifolds and
> work just fine...I think there are a few people here on the
> list that have even
> fires, although am not aware of anyone who has done the
> swap personally..
>
> AND of course if you really want to do the MAC DADDY
> swap (particularly
> down at sea level) you must stop by and take a look at
> Lee's site....he put in a
> good ol' fashioned chevy small block.....gotta say, if
> you gonna do it, go big
> and put in a V-8, 350 would be SOOOO sweet and forget about
> any kind of parts
> availability issues (at least as far as the engine is
> concerned) lot's of
> aftermarket upgrades too.
>
> Hope this is helpful...
>
> Cheers,
> B.C.
>
>
>
>
>
> Heya
> BC...
>
> Wondering if you know off hand what kind of engine I could
> drop
> into a sportsman 155. Don't know if I need to look
> for specific years or what
> not.
>
> - Nexi
>
>
>
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Received on Tuesday, 16 February 2010