Re: [OMC-Boats] Outdrive Gear Ratios v6 versus v8

Hello

I also live in Michigan and have been watching the Rogue. I would like to see this one back on water. Should the price not go too high I will try to aquire it for restoration. I doubt it will take much to get it running. I have two 67 sportsmans and will be selling one soon. I also have a restored 64 Johnson deluxe with V6. I have been considering a larger boat like the 19 footers with V8.

Do you need a upper gearcase or just looking to keep one for a spare?

Regards
Robert

________________________________

From: omc-boats-bounces@lists.ultimate.com
To: Evinrude & Johnson Boats of the 1960's and 70's ; lks@hhscott.com
Sent: Sun Apr 12 12:43:14 2009
Subject: Re: [OMC-Boats] Outdrive Gear Ratios v6 versus v8


Hi Lee and list members:

Thanks for reply. I'm thinking about bidding on a cheap '67 rogue on ebay right now, mainly because it has great seats identical to the '68 sportsman seats, and because it's only 50 miles from my Sportsmans in Michigan. But the cost has reached $360, so it would be great if it had significant other parts I could use - like the outdrive. Hence my question on whether it is practical to switch gears in the upper gearcase. I figure if I wear out a Sportsman outdrive, hopefully its upper gears can be transplanted into the outdrive from the Rogue.

Anyone wanting a '67 Rogue in good condition should take a look. This one has a lot of life in it and should not be a parts boat. Says the engine does not start, but also says it has sat for 10 years unused. I'd withdraw if someone on the list wanted it to restore:

http://tinyurl.com/67Rogue

-Doug Julien

--- On Sun, 4/12/09, lks@hhscott.com <lks@hhscott.com> wrote:


        From: lks@hhscott.com <lks@hhscott.com>
        Subject: Re: [OMC-Boats] Outdrive Gear Ratios v6 versus v8
        To: dfjulien@swbell.net, "Evinrude & Johnson Boats of the 1960's and 70's" <omc-boats@lists.ultimate.com>
        Date: Sunday, April 12, 2009, 7:20 AM
        
        
        Hi Doug,
         
        So let's be clear about your goals? Your asking if it's possible to take the outdrive assembly from a V8 and replace it's UPPER GEAR SETS (21:16; 21:17, 21:18, 21:19) with UPPER gear sets from the Buick V6 (25:25) ratio's ? I'm unclear because your footer lists 68 and 69 Sportsman's which probably already have V6 (25:25) stock gear sets?
         
        First make sure you have what you think you have: Is your V8 unit a four or five bolt cap unit? You want the later five-bolt cap units introduced after 1967. Secondly is it a long-shaft or short shaft?
        Short shaft's usually came off later Ford V8's (170-190-235hp) which had different ratios (see my chart). You notice they all share common lower gear sets of 15:23. It is the upper gear sets that vary.
         
        I've never personally done this job, I understand it can be complicated by year-to-year changes and differences in shims, bearings, etc. Mixing and matching usually leads to problems.
         
        What I did was to exchange the entire power unit without cracking open the units. At my altitude, I considered the fact that my 21:16 V8 gearing is a little tall, but I have enough room to still compensate by running a relatively short 13-inch SST prop. The 21:19 set used in the 165-hp, straight six Chevy is ideal but hard to find. The 302 Fords came in 175-hp @ 21:18, and 190-hp @ 21:17 but were usually as I said before short-legs. Remember I have a 24 per cent power loss when I run at 7000 feet, so I seriously considered running lower V6 gearing in my V8. The benefit of running the taller V8 gearing is I get fantastic cruising fuel economy, (that is provided I'm not into the secondaries of the QuadraJet.)
         
        So to summarize: Find out exactly what you have, by counting teeth, or precisely counting input to output rotational relationships. And either exchange entire down-leg units or find someone mechanically familiar with rebuilding the outdrive with the desired gear set ratios.
         
        Happy Easter
         
        Lee Shuster
         

                ----- Original Message -----
                From: DOUGLAS JULIEN <mailto:dfjulien@swbell.net>
                To: Evinrude & Johnson Boats of the 1960's and 70's <mailto:omc-boats@lists.ultimate.com>
                Sent: Saturday, April 11, 2009 10:51 PM
                Subject: [OMC-Boats] Outdrive Gear Ratios v6 versus v8

Hi Lee and list folks:

Lee, when you upgraded from the V-6 to the V-8, did you change the gears in your outdrive? Per your prop page, these engines used different ratios in the upper gears:

http://hhscott.com/evinrude/props.htm

I'm wondering how to do the reverse - to change the V8 gears in an outdrive to gears designed for the V6. Is it a simple matter to switch these things out?

Thanks for any info.

-Doug Julien, '68 and '69 Sportsman 155's

                

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Received on Sunday, 12 April 2009