TH
Terry Hoy
Fri, Aug 2, 2002 6:13 PM
snip
For years Evinrude 9.9 amd 15 hp motors were exactly the same except for a
throttle
restriction screw on the lesser powered engine. Fifteen minutes with a
screwdriver and you could get a 50% boost in horsepower
snip
Anyone know how to do this?
Terry Hoy
snip
For years Evinrude 9.9 amd 15 hp motors were exactly the same except for a
throttle
restriction screw on the lesser powered engine. Fifteen minutes with a
screwdriver and you could get a 50% boost in horsepower
snip
Anyone know how to do this?
Terry Hoy
RR
Ron Rogers
Fri, Aug 2, 2002 6:18 PM
No, but the same goes for the Nissan 2 stroke 9.9.
Ron
----- Original Message -----
From: "Terry Hoy" THOY@TELE-CONNECT.COM
To: "'Trawler World List'" trawler-world-list@lists.samurai.com
Sent: Friday, August 02, 2002 2:13 PM
Subject: TWL: Re: Trawler-world-list digest, Vol 5 #405 - 21 msgs
snip
For years Evinrude 9.9 amd 15 hp motors were exactly the same except for a
throttle
restriction screw on the lesser powered engine. Fifteen minutes with a
screwdriver and you could get a 50% boost in horsepower
snip
Anyone know how to do this?
Terry Hoy
http://lists.samurai.com/mailman/listinfo/trawler-world-list
No, but the same goes for the Nissan 2 stroke 9.9.
Ron
----- Original Message -----
From: "Terry Hoy" <THOY@TELE-CONNECT.COM>
To: "'Trawler World List'" <trawler-world-list@lists.samurai.com>
Sent: Friday, August 02, 2002 2:13 PM
Subject: TWL: Re: Trawler-world-list digest, Vol 5 #405 - 21 msgs
> snip
> For years Evinrude 9.9 amd 15 hp motors were exactly the same except for a
> throttle
> restriction screw on the lesser powered engine. Fifteen minutes with a
> screwdriver and you could get a 50% boost in horsepower
> snip
>
> Anyone know how to do this?
>
> Terry Hoy
> _______________________________________________
> http://lists.samurai.com/mailman/listinfo/trawler-world-list
EP
Ed Pare
Fri, Aug 2, 2002 6:41 PM
Does anyone know how to do this on the Mercury 9.9 2stroke?
Ed Pare'
M/V Scheherezade, CHB 34
Email: edbrooke@appleisp.net
No, but the same goes for the Nissan 2 stroke 9.9.
Ron
----- Original Message -----
From: "Terry Hoy" THOY@TELE-CONNECT.COM
To: "'Trawler World List'" trawler-world-list@lists.samurai.com
Sent: Friday, August 02, 2002 2:13 PM
Subject: TWL: Re: Trawler-world-list digest, Vol 5 #405 - 21 msgs
snip
For years Evinrude 9.9 amd 15 hp motors were exactly the same except for a
throttle
restriction screw on the lesser powered engine. Fifteen minutes with a
screwdriver and you could get a 50% boost in horsepower
snip
Anyone know how to do this?
Terry Hoy
http://lists.samurai.com/mailman/listinfo/trawler-world-list
Does anyone know how to do this on the Mercury 9.9 2stroke?
Ed Pare'
M/V Scheherezade, CHB 34
Email: edbrooke@appleisp.net
> No, but the same goes for the Nissan 2 stroke 9.9.
>
> Ron
> ----- Original Message -----
> From: "Terry Hoy" <THOY@TELE-CONNECT.COM>
> To: "'Trawler World List'" <trawler-world-list@lists.samurai.com>
> Sent: Friday, August 02, 2002 2:13 PM
> Subject: TWL: Re: Trawler-world-list digest, Vol 5 #405 - 21 msgs
>
>
>> snip
>> For years Evinrude 9.9 amd 15 hp motors were exactly the same except for a
>> throttle
>> restriction screw on the lesser powered engine. Fifteen minutes with a
>> screwdriver and you could get a 50% boost in horsepower
>> snip
>>
>> Anyone know how to do this?
>>
>> Terry Hoy
>> _______________________________________________
>> http://lists.samurai.com/mailman/listinfo/trawler-world-list
> _______________________________________________
> http://lists.samurai.com/mailman/listinfo/trawler-world-list
SD
Steven Dubnoff
Fri, Aug 2, 2002 7:46 PM
At 02:13 PM 8/2/2002 -0400, you wrote:
snip
For years Evinrude 9.9 amd 15 hp motors were exactly the same except for a
throttle
restriction screw on the lesser powered engine. Fifteen minutes with a
screwdriver and you could get a 50% boost in horsepower
snip
snip
I think this may be an urban legend. This sounded too good to be true, so
I did a search on the outboard-intensive newsgroup, rec.boats, on "change
9.9 to 15" in order to find out precisely how to do it:
http://groups.google.com/groups?as_q=change%209.9%20to%2015&safe=off&ie=UTF-8&oe=UTF-8&as_ugroup=rec.boats.*&lr=&hl=en
The consensus seems to be that, although these are built on the same block,
many parts (cams, carb jets, lower unit and so on) may differ between the
models.
Best,
Steve
Steven Dubnoff sdubnoff@circlesys.com
Circle Systems We make your data instantly usable.
Download Stat/Transfer from http://www.stattransfer.com
1001 Fourth Avenue, #3200 (206) 682-3783
Seattle, WA 98154 Fax (206) 328-4788
At 02:13 PM 8/2/2002 -0400, you wrote:
>snip
>For years Evinrude 9.9 amd 15 hp motors were exactly the same except for a
>throttle
>restriction screw on the lesser powered engine. Fifteen minutes with a
>screwdriver and you could get a 50% boost in horsepower
>snip
>snip
I think this may be an urban legend. This sounded too good to be true, so
I did a search on the outboard-intensive newsgroup, rec.boats, on "change
9.9 to 15" in order to find out precisely how to do it:
http://groups.google.com/groups?as_q=change%209.9%20to%2015&safe=off&ie=UTF-8&oe=UTF-8&as_ugroup=rec.boats.*&lr=&hl=en
The consensus seems to be that, although these are built on the same block,
many parts (cams, carb jets, lower unit and so on) may differ between the
models.
Best,
Steve
----------------------------------------------------------------
Steven Dubnoff sdubnoff@circlesys.com
Circle Systems We make your data instantly usable.
Download Stat/Transfer from http://www.stattransfer.com
1001 Fourth Avenue, #3200 (206) 682-3783
Seattle, WA 98154 Fax (206) 328-4788
J&
John & Judy Tones
Fri, Aug 2, 2002 8:51 PM
Ah yes but Hondas in the 70's on the other hand were very easy to "up_grade"
as the camshaft was the ONLY difference between the 7.5 HP and 10.5 Hp
versions. They are a very easy motor to work on and ALL the parts except for
the camshaft and the cover decals were exactly the same part numbers.
Upgraded mine for use on my 24 ft sailboat, got better power without
overheating and used it for about 5 years after with great results - then I
got smart and sold it for "Penta" and an inside helm and cabin heater!!
John Tones MV Penta
Victoria, BC
Ah yes but Hondas in the 70's on the other hand were very easy to "up_grade"
as the camshaft was the ONLY difference between the 7.5 HP and 10.5 Hp
versions. They are a very easy motor to work on and ALL the parts except for
the camshaft and the cover decals were exactly the same part numbers.
Upgraded mine for use on my 24 ft sailboat, got better power without
overheating and used it for about 5 years after with great results - then I
got smart and sold it for "Penta" and an inside helm and cabin heater!!
John Tones MV Penta
Victoria, BC
AH
Alex Hirsekorn
Sat, Aug 3, 2002 1:03 AM
The consensus seems to be that, although these are built on the same
many parts (cams, carb jets, lower unit and so on) may differ between the
models.
Hi Steve,
Your newsgroup search seemed like such a good idea that I decided to do a
similar web search. I used "9.9 to 15" on Google and came up with the
following Johnson/Evinrude references:
http://www.brokeboats.com/stuff.html
9.9 to 15 HP
If you are trying to increase your HP to 15hp simply switching a carb won't
do it without also switching the cylinder head as well. It would be way too
expensive to buy both items new(around 300 bucks or so). You should check
around at dealers, shops, and friends, etc. and try to locate a junk, blown
15 HP Johnson or Evinrude; both are same except for the paint. Remove the
carb and cylinder head and clean and rebuild the carb with a new kit; get a
new head gasket, and install em on your motor. You'll see quite a difference
in power.
http://www.myasylum.com/sbf/messages/186.html
Anyone have info for this, aside from the carburetor change? This is for a
1990 model. It was 11 years ago, but when I tried to do the "common"
conversion via carb swap only, it didn't work. Results were: raw fuel out
the exhaust, no significant power increase. After contemplating this for
several years, I have come to the conclusions: The exhaust tube for the 15hp
is different than the 10hp, the exhaust ports in the 15(exhaust housing
casting) may be different than the 10, the timing advance cam may be
different. There is absolutely no info regarding this in the service manual
or parts list except: I saw a different exhaust tube in a photo of something
unrelated in the service manual. Johnson went to the trouble of being sure
the necessary info was not available in their documents.
I also came across a couple of vague indications that nobody seems to know
specifically how to do the mod to either Mercury or Yamaha engines.
All things considered, it would seem that the conversion isn't worthwhile
under ordinary circumstances. The idea of switching ID stickers for tax
purposes will be left to the individual's sense of ethics and gamesmanship.
Legendarily yours,
Alex
----- Original Message -----
From: "Steven Dubnoff" <sdubnoff@circlesys.com>
>
> The consensus seems to be that, although these are built on the same
block,
> many parts (cams, carb jets, lower unit and so on) may differ between the
> models.
>
Hi Steve,
Your newsgroup search seemed like such a good idea that I decided to do a
similar web search. I used "9.9 to 15" on Google and came up with the
following Johnson/Evinrude references:
http://www.brokeboats.com/stuff.html
9.9 to 15 HP
If you are trying to increase your HP to 15hp simply switching a carb won't
do it without also switching the cylinder head as well. It would be way too
expensive to buy both items new(around 300 bucks or so). You should check
around at dealers, shops, and friends, etc. and try to locate a junk, blown
15 HP Johnson or Evinrude; both are same except for the paint. Remove the
carb and cylinder head and clean and rebuild the carb with a new kit; get a
new head gasket, and install em on your motor. You'll see quite a difference
in power.
http://www.myasylum.com/sbf/messages/186.html
Anyone have info for this, aside from the carburetor change? This is for a
1990 model. It was 11 years ago, but when I tried to do the "common"
conversion via carb swap only, it didn't work. Results were: raw fuel out
the exhaust, no significant power increase. After contemplating this for
several years, I have come to the conclusions: The exhaust tube for the 15hp
is different than the 10hp, the exhaust ports in the 15(exhaust housing
casting) may be different than the 10, the timing advance cam may be
different. There is absolutely no info regarding this in the service manual
or parts list except: I saw a different exhaust tube in a photo of something
unrelated in the service manual. Johnson went to the trouble of being sure
the necessary info was not available in their documents.
I also came across a couple of vague indications that nobody seems to know
_specifically_ how to do the mod to either Mercury or Yamaha engines.
All things considered, it would seem that the conversion isn't worthwhile
under ordinary circumstances. The idea of switching ID stickers for tax
purposes will be left to the individual's sense of ethics and gamesmanship.
Legendarily yours,
Alex
J&
John & Kathleen
Sat, Aug 3, 2002 1:23 AM
I've been following this thread with interest (something to take my mind off
my "Bahamian MT40" situation, I guess), mainly because I have a 1989
Evinrude 15 HP on my Zodiac. It came from the factory with 15 HP decals, and
the right parts to make it a real 15 HP version. :>)
I keep reading about folks who have changed the 15 HP ID stickers to 9.9 for
various (and according to Alex, perhaps cases of ungamemanship) reasons.
Where are you getting these old style stickers? Just the other day I went to
my local OMC dealer for a small part that had broken, and asked about new
decals for my 15. Since OMC went under, many parts for the older motors are
no longer available, the decal set being one of them. Anyone got a source
for them? I'm not interested in changing it to a "9.9", just want to pretty
it up a bit.
Thanks in advance.
John Garrison
I've been following this thread with interest (something to take my mind off
my "Bahamian MT40" situation, I guess), mainly because I have a 1989
Evinrude 15 HP on my Zodiac. It came from the factory with 15 HP decals, and
the right parts to make it a real 15 HP version. :>)
I keep reading about folks who have changed the 15 HP ID stickers to 9.9 for
various (and according to Alex, perhaps cases of ungamemanship) reasons.
Where are you getting these old style stickers? Just the other day I went to
my local OMC dealer for a small part that had broken, and asked about new
decals for my 15. Since OMC went under, many parts for the older motors are
no longer available, the decal set being one of them. Anyone got a source
for them? I'm not interested in changing it to a "9.9", just want to pretty
it up a bit.
Thanks in advance.
John Garrison
KP
Keith Pleas
Sat, Aug 3, 2002 5:41 PM
... I have a 1989 Evinrude 15 HP on my Zodiac.
I actually just bought one of these motors last week for my small
Novurania RIB. There's a guy in Seattle who only rebuilds 15hp OMCs from
that vintage: he does 4 or 5 of them every week for $600 with a 90 day
guarantee, all rebuilt, upgraded to electronic ignition, repainted, etc.
The only thing that's obviously "vintage" is the hood (the throttle grip
is also original), and he said that there are no mint ones available.
I'm pretty sure he said he could get stickers, but they were around
$150/set.
Keith
>>... I have a 1989 Evinrude 15 HP on my Zodiac.
I actually just bought one of these motors last week for my small
Novurania RIB. There's a guy in Seattle who only rebuilds 15hp OMCs from
that vintage: he does 4 or 5 of them every week for $600 with a 90 day
guarantee, all rebuilt, upgraded to electronic ignition, repainted, etc.
The only thing that's obviously "vintage" is the hood (the throttle grip
is also original), and he said that there are no mint ones available.
I'm pretty sure he said he could get stickers, but they were around
$150/set.
Keith
J&
John & Kathleen
Sat, Aug 3, 2002 8:02 PM
I'm pretty sure he said he could get stickers, but they were around
$150/set.
Hi Keith,
Thanks for the info on the decal set. However, my original post said "I just
want to pretty it up", not get it gold-plated!! :>)
Regards,
John
----- Original Message -----
From: Keith Pleas <keithp@deeptraining.com>
Subject: TWL: RE: Re: "Upgrading" outboards
> I'm pretty sure he said he could get stickers, but they were around
> $150/set.
Hi Keith,
Thanks for the info on the decal set. However, my original post said "I just
want to pretty it up", not get it gold-plated!! :>)
Regards,
John
K
Keith
Mon, Aug 5, 2002 10:45 AM
Boy, I sure would like to know how to do this with a Nissan. I am about
to buy a new OB, but Nissan doesn't make a two stroke 15hp, so I was
about to buy a Yamaha 15.
Ron Rogers wrote:
No, but the same goes for the Nissan 2 stroke 9.9.
Ron
snip
For years Evinrude 9.9 amd 15 hp motors were exactly the same except for a
throttle
restriction screw on the lesser powered engine. Fifteen minutes with a
screwdriver and you could get a 50% boost in horsepower
--
Keith
Friends may come and go, but enemies accumulate.
Boy, I sure would like to know how to do this with a Nissan. I am about
to buy a new OB, but Nissan doesn't make a two stroke 15hp, so I was
about to buy a Yamaha 15.
Ron Rogers wrote:
>
> No, but the same goes for the Nissan 2 stroke 9.9.
>
> Ron
>
> > snip
> > For years Evinrude 9.9 amd 15 hp motors were exactly the same except for a
> > throttle
> > restriction screw on the lesser powered engine. Fifteen minutes with a
> > screwdriver and you could get a 50% boost in horsepower
--
__________________
Keith
Friends may come and go, but enemies accumulate.
