OUTRAGE 18 With Sterndrive: Adding Outboard Auxiliary Motor

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Author Topic:   OUTRAGE 18 With Sterndrive: Adding Outboard Auxiliary Motor

ttcola posted 08-18-2010 11:32 PM ET (US)
[The author begins his article by telling us he is] putting [an outboard auxiliary motor] on the transom [of] an OUTRAGE 18 with a sterndrive. [The OUTRAGE 18] has a full swim step across [the transom]. Other than cutting the [here used the acronym SS which normally means stainless steel but here perhaps means "swim step"] [I] can mount on [the new auxiliary outboard motor with] a bracket. [The author says he is] also thinking of thru-bolting [something] to [the] transom [with] a 20-inch neck bracket that will lay on the SS [possibly means swim step], using the ss [possibly means swim step] as added support. [T]hat way [something] will have the transom support AND the swim step. Sound good?
[A]lso, is the [proper] length of [the auxiliary motor] shaft long or extra long? Does the kicker propeller need to be [immsersed] as deeply as the sterndrive propeller? Since [the auxiliary outboard motor is] just for trolling and get-home, can [unclear, perhaps means the propeller of the auxiliary outboard] be just below the water line? The boat is pretty stern-heavy [because] of the sterndrive. Thanks.
coolarrow posted 08-20-2010 11:06 AM ET (US)
Hey, I have a long shaft HONDA 7.5 on [my Boston Whaler OUTRAGE 18 with sterndrive] and it lives on the starboard side all the time. When I am on plane it drags a little and creates a little spray in the upright position.
jimh posted 08-20-2010 11:24 AM ET (US)
The acronym SS generally means stainless steel. Have you intended a new meaning for the acronym SS in your article?
dgoodhue posted 08-20-2010 11:52 AM ET (US)
I didn't even know they made an Outage 18 with sterndrive. The one GTX that I have seen many years sat really low in the water at rest. The swim platform wasn't far from the water and it seemed like the water was halfway up the transom.
jimh posted 08-20-2010 12:07 PM ET (US)
So far I have counted about five threads where this topic has been introduced. Let's please stop introducing this topic into other threads. I will delete all of the other instances where this topic has been introduced into other discussions and move any replies into this thread.
It is much more effective to concentrate the discussion of a particular topic into a single thread. Spreading the discussion around in half a dozen threads really is not a particularly effective way to conduct the discussion.
SJUAE posted 08-20-2010 04:03 PM ET (US)
Jim
I noticed the same and stuck to using this thread
http://continuouswave.com/ubb/Forum3/HTML/017952.html
Your right he's referring to ss as swim platform
To continue here:

Does it look something like this?
Looking at the standard height of a outboard on this hull appears 4-5 inches below the rub rail, your swim platform (ss) is much lower and the kicker is likely to get swamped.
I would suggest the rotation point of the kicker should be similar in height to a normal outboard mounting if a static bracket is used
IMO you would need to fabricate a custom bracket mounted on the transom with similar struts to the existing, the kicker bracket would need to be attached to the swim platform to provide support as the original struts would be replaced by those of the new bracket
Due to the offset to port and the required height a standard length kicker may be a close fit and liable to slip on a rolling sea
Regards
Steve
Regards
Steve
ttcola posted 08-14-2010 04:15 PM ET (US)
[Moved to this thread from another thread where this same topic was introduced.--jimh]
For an [OUTRAGE 18] can the swim step handle a kicker?
SJUAE posted 08-15-2010 03:57 PM ET (US)
I would think not as it's only RFG and screwed to the transom and you would also loose an important safety feature--the ladder
I made a custom bracket that is a mirror image of my boarding platform simply by tracing it and mounting on the opposite side with through bolts
http://s707.photobucket.com/albums/ww76/SJUAE/Kicker/
There are some others brackets included in the album
Regards
Steve
ttcola posted 08-18-2010 11:20 PM ET (US)
[Something] is a FULL swim step all the way across back [I]f [I] put kicker on port side, ladder is unaffected. [SS again used perhaps to mean swim step] is supported by four brackets; [each] bracket goes from [ss used to mean swim step] to transom, two brackets on [each] side of sterndrive and is also directly bolted to transom. [I] was thinking to find or [fabricate] a bracket that would direct thru-bolt to the transom AND rest on the [ss used to mean swim step]. [T]he bracket should extend to the end of the [ss used to mean swim step]. [Tell the author] any thoughts [you have about what he said].
SJUAE posted 08-19-2010 03:30 AM ET (US)
Sorry did not appreciate that your swim step was so wide and the ladder was incorporated into this--looking at the 1999 parts diagrams
I presume that you are trying put a bracket on with a minimum offset to utilize the space of the swim step for the kicker when rotated up this may be too high for the kicker even with a long shaft you need to check this out carefully first
I don't see any reason other than cosmetics to attach a bracket to the swim step it can all be mounted/bolted off the transom
Regards
Steve
ttcola posted 08-19-2010 05:38 PM ET (US)
[The installation of the auxiliary outboard is] for an [a 1984 Boston Whaler GTX] [T]he swim step sits pretty high up the transom. [I] do plan on thru-bolting, to the transom, as the primary support, then extend the neck of the kicker bracket over the swim step, and lay the neck on the [ss used to mean swim step] for added support--not sure such a bracket exists and may have to fabricate one. [I am] hoping a long-shaft 20-inch will do, but not sure and may have to go with a 25-inch. [Give the author] any thoughts [about what he just said].
SJUAE posted 08-19-2010 09:39 PM ET (US)
Does it look something like this ?
http://s707.photobucket.com/albums/ww76/SJUAE/Stern%20and%20misc/ ?action=view¤t=Picture-5.jpg
Regards
Steve
jimh posted 08-20-2010 09:20 PM ET (US)
One thought that comes to me: do you have two boats? You started out asking about an OUTRAGE 18 and now you have changed to a GTX 18.
I am not clear about the meaning of a "swim step" which you describe as going across the entire transom. I think most people are more familiar with the term swim platform to describe a full-width appendage mounted on the transom above the waterline to be used as an aid to getting into the water for swimming. The term step usually implies a ladder or stairs.
If your boats, either the OUTRAGE or the GTX, have a full width swim platform, it would be reasonable to conclude that as a structure they would have been designed to support the weight of at least one full-size adult, which we could say is 200-lbs. That is enough strength to support a typical small outboard motor, which should not weigh more than 200-lbs, I would expect.
SJUAE posted 08-20-2010 11:01 PM ET (US)
Jim
Although I agree the swim platform can probably take the weight statically there is more to consider underway (i.e. the strength of the platform, screws/bolts, vibration etc) which is why I would prefer a separate bracket e.g. :

Regards
Steve
jimh posted 08-21-2010 05:53 AM ET (US)
Steve--Your custom aluminum welded bracket is quite marvelously designed and very nicely fabricated. Thanks for sharing the details. I have to say your solution to mounting the auxiliary engine is very ingenious. I had seen pictures of your boat with the auxiliary outboard on the stern, and I did not realize the work and craftsmanship that went into making that mount.
SJUAE posted 08-21-2010 07:35 AM ET (US)
Jim
Thanks, although I take full credit for the cardboard mock up the fabrication was FOC as my friend was a manger of a local fabrication company.
It's probably more impressive when you realise is made out of offshore quality 316 SS 2mm and 4mm thick and weighed 12lbs. Aluminium would of been ~4lbs lighter but far more prone to fatigue and cracks on the welds. The holes in some of the stiffeners was to reduce water pressure build up and save a little weight.
Even with my hefty bracket at a particular RPM my kicker resonates slightly I think ttcola swim platform would be far worse.
Regards
Steve
Tohsgib posted 08-21-2010 09:48 AM ET (US)
In that case I would want a longer shaft. Looks marginal in height.
SJUAE posted 08-21-2010 01:49 PM ET (US)
tohsgib
I agree having no dimensions or other info I just approximated the raitios it looks doubtful for a 20" shaft. I think the transom angle is probably not as much but that would have little impact if wrong.
Regards
Steve
ttcola posted 08-22-2010 07:47 PM ET (US)
thanx to everyone for the help/advice... jim sorry my protocol isnt upto speed yet.....promise ill get ship-shape real quick:-) youre correct my "ss" did mean "swim-step", and again sorry, i did mean "swim platform". i was looking at an outrage 18, but bought the gtx. the pic steve posted is the very one.
And Steve, big THANX for the diagram! i never thought of going that way with it. Great Idea! I'm trying to post a pic of whats underneath on the port side. Not sure how yet :(
Id like to mount on the port side and still have full use of the starboard ladder for my 2 lil ones:) I'm pretty sure im gonna need a 9.9hp w/ a 25" shaft. If i can find a fabricator here, steve's design is first on the list! otherwise, i have to go above the swim platform....again, much thanx to all for helping a new, and one day, long-time whaler owner:-)
SJUAE posted 08-23-2010 03:48 PM ET (US)
ttcola
Funny how I found the picture of the boat you bought :)
Here's the couple of pictures you sent me:
http://i707.photobucket.com/albums/ww76/SJUAE/Kicker/DSC_0006.jpg
[url]http://i707.photobucket.com/albums/ww76/SJUAE/Kicker/GTXundrSP.jpg/url]
Here's a quick sketch I done for the suggested bracket, add the dimennsions to suit.
http://i707.photobucket.com/albums/ww76/SJUAE/Kicker/kickerbracket.jpg
You could space the 2 supports so that the cover the existing holes. I suggest the top 4 bolts are through the transom and the bottom 4 can be screws if there is wood behind. I have shown a wooden pad so you can clamp for easy removal of the kicker but this could be a plate. Any good bike shop should be able to fabricate this for you in SS (not swim platform BTW :)).
Regards
Steve

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Author	Topic: OUTRAGE 18 With Sterndrive: Adding Outboard Auxiliary Motor
ttcola	posted 08-18-2010 11:32 PM ET (US) [The author begins his article by telling us he is] putting [an outboard auxiliary motor] on the transom [of] an OUTRAGE 18 with a sterndrive. [The OUTRAGE 18] has a full swim step across [the transom]. Other than cutting the [here used the acronym SS which normally means stainless steel but here perhaps means "swim step"] [I] can mount on [the new auxiliary outboard motor with] a bracket. [The author says he is] also thinking of thru-bolting [something] to [the] transom [with] a 20-inch neck bracket that will lay on the SS [possibly means swim step], using the ss [possibly means swim step] as added support. [T]hat way [something] will have the transom support AND the swim step. Sound good? [A]lso, is the [proper] length of [the auxiliary motor] shaft long or extra long? Does the kicker propeller need to be [immsersed] as deeply as the sterndrive propeller? Since [the auxiliary outboard motor is] just for trolling and get-home, can [unclear, perhaps means the propeller of the auxiliary outboard] be just below the water line? The boat is pretty stern-heavy [because] of the sterndrive. Thanks.
coolarrow	posted 08-20-2010 11:06 AM ET (US) Hey, I have a long shaft HONDA 7.5 on [my Boston Whaler OUTRAGE 18 with sterndrive] and it lives on the starboard side all the time. When I am on plane it drags a little and creates a little spray in the upright position.
jimh	posted 08-20-2010 11:24 AM ET (US) The acronym SS generally means stainless steel. Have you intended a new meaning for the acronym SS in your article?
dgoodhue	posted 08-20-2010 11:52 AM ET (US) I didn't even know they made an Outage 18 with sterndrive. The one GTX that I have seen many years sat really low in the water at rest. The swim platform wasn't far from the water and it seemed like the water was halfway up the transom.
jimh	posted 08-20-2010 12:07 PM ET (US) So far I have counted about five threads where this topic has been introduced. Let's please stop introducing this topic into other threads. I will delete all of the other instances where this topic has been introduced into other discussions and move any replies into this thread. It is much more effective to concentrate the discussion of a particular topic into a single thread. Spreading the discussion around in half a dozen threads really is not a particularly effective way to conduct the discussion.
SJUAE	posted 08-20-2010 04:03 PM ET (US) Jim I noticed the same and stuck to using this thread http://continuouswave.com/ubb/Forum3/HTML/017952.html Your right he's referring to ss as swim platform To continue here: Does it look something like this? Looking at the standard height of a outboard on this hull appears 4-5 inches below the rub rail, your swim platform (ss) is much lower and the kicker is likely to get swamped. I would suggest the rotation point of the kicker should be similar in height to a normal outboard mounting if a static bracket is used IMO you would need to fabricate a custom bracket mounted on the transom with similar struts to the existing, the kicker bracket would need to be attached to the swim platform to provide support as the original struts would be replaced by those of the new bracket Due to the offset to port and the required height a standard length kicker may be a close fit and liable to slip on a rolling sea Regards Steve Regards Steve
ttcola	posted 08-14-2010 04:15 PM ET (US) [Moved to this thread from another thread where this same topic was introduced.--jimh] For an [OUTRAGE 18] can the swim step handle a kicker?
SJUAE	posted 08-15-2010 03:57 PM ET (US) I would think not as it's only RFG and screwed to the transom and you would also loose an important safety feature--the ladder I made a custom bracket that is a mirror image of my boarding platform simply by tracing it and mounting on the opposite side with through bolts http://s707.photobucket.com/albums/ww76/SJUAE/Kicker/ There are some others brackets included in the album Regards Steve
ttcola	posted 08-18-2010 11:20 PM ET (US) [Something] is a FULL swim step all the way across back [I]f [I] put kicker on port side, ladder is unaffected. [SS again used perhaps to mean swim step] is supported by four brackets; [each] bracket goes from [ss used to mean swim step] to transom, two brackets on [each] side of sterndrive and is also directly bolted to transom. [I] was thinking to find or [fabricate] a bracket that would direct thru-bolt to the transom AND rest on the [ss used to mean swim step]. [T]he bracket should extend to the end of the [ss used to mean swim step]. [Tell the author] any thoughts [you have about what he said].
SJUAE	posted 08-19-2010 03:30 AM ET (US) Sorry did not appreciate that your swim step was so wide and the ladder was incorporated into this--looking at the 1999 parts diagrams I presume that you are trying put a bracket on with a minimum offset to utilize the space of the swim step for the kicker when rotated up this may be too high for the kicker even with a long shaft you need to check this out carefully first I don't see any reason other than cosmetics to attach a bracket to the swim step it can all be mounted/bolted off the transom Regards Steve
ttcola	posted 08-19-2010 05:38 PM ET (US) [The installation of the auxiliary outboard is] for an [a 1984 Boston Whaler GTX] [T]he swim step sits pretty high up the transom. [I] do plan on thru-bolting, to the transom, as the primary support, then extend the neck of the kicker bracket over the swim step, and lay the neck on the [ss used to mean swim step] for added support--not sure such a bracket exists and may have to fabricate one. [I am] hoping a long-shaft 20-inch will do, but not sure and may have to go with a 25-inch. [Give the author] any thoughts [about what he just said].
SJUAE	posted 08-19-2010 09:39 PM ET (US) Does it look something like this ? http://s707.photobucket.com/albums/ww76/SJUAE/Stern%20and%20misc/ ?action=view¤t=Picture-5.jpg Regards Steve
jimh	posted 08-20-2010 09:20 PM ET (US) One thought that comes to me: do you have two boats? You started out asking about an OUTRAGE 18 and now you have changed to a GTX 18. I am not clear about the meaning of a "swim step" which you describe as going across the entire transom. I think most people are more familiar with the term swim platform to describe a full-width appendage mounted on the transom above the waterline to be used as an aid to getting into the water for swimming. The term step usually implies a ladder or stairs. If your boats, either the OUTRAGE or the GTX, have a full width swim platform, it would be reasonable to conclude that as a structure they would have been designed to support the weight of at least one full-size adult, which we could say is 200-lbs. That is enough strength to support a typical small outboard motor, which should not weigh more than 200-lbs, I would expect.
SJUAE	posted 08-20-2010 11:01 PM ET (US) Jim Although I agree the swim platform can probably take the weight statically there is more to consider underway (i.e. the strength of the platform, screws/bolts, vibration etc) which is why I would prefer a separate bracket e.g. : Regards Steve
jimh	posted 08-21-2010 05:53 AM ET (US) Steve--Your custom aluminum welded bracket is quite marvelously designed and very nicely fabricated. Thanks for sharing the details. I have to say your solution to mounting the auxiliary engine is very ingenious. I had seen pictures of your boat with the auxiliary outboard on the stern, and I did not realize the work and craftsmanship that went into making that mount.
SJUAE	posted 08-21-2010 07:35 AM ET (US) Jim Thanks, although I take full credit for the cardboard mock up the fabrication was FOC as my friend was a manger of a local fabrication company. It's probably more impressive when you realise is made out of offshore quality 316 SS 2mm and 4mm thick and weighed 12lbs. Aluminium would of been ~4lbs lighter but far more prone to fatigue and cracks on the welds. The holes in some of the stiffeners was to reduce water pressure build up and save a little weight. Even with my hefty bracket at a particular RPM my kicker resonates slightly I think ttcola swim platform would be far worse. Regards Steve
Tohsgib	posted 08-21-2010 09:48 AM ET (US) In that case I would want a longer shaft. Looks marginal in height.
SJUAE	posted 08-21-2010 01:49 PM ET (US) tohsgib I agree having no dimensions or other info I just approximated the raitios it looks doubtful for a 20" shaft. I think the transom angle is probably not as much but that would have little impact if wrong. Regards Steve
ttcola	posted 08-22-2010 07:47 PM ET (US) thanx to everyone for the help/advice... jim sorry my protocol isnt upto speed yet.....promise ill get ship-shape real quick:-) youre correct my "ss" did mean "swim-step", and again sorry, i did mean "swim platform". i was looking at an outrage 18, but bought the gtx. the pic steve posted is the very one. And Steve, big THANX for the diagram! i never thought of going that way with it. Great Idea! I'm trying to post a pic of whats underneath on the port side. Not sure how yet :( Id like to mount on the port side and still have full use of the starboard ladder for my 2 lil ones:) I'm pretty sure im gonna need a 9.9hp w/ a 25" shaft. If i can find a fabricator here, steve's design is first on the list! otherwise, i have to go above the swim platform....again, much thanx to all for helping a new, and one day, long-time whaler owner:-)
SJUAE	posted 08-23-2010 03:48 PM ET (US) ttcola Funny how I found the picture of the boat you bought :) Here's the couple of pictures you sent me: http://i707.photobucket.com/albums/ww76/SJUAE/Kicker/DSC_0006.jpg [url]http://i707.photobucket.com/albums/ww76/SJUAE/Kicker/GTXundrSP.jpg/url] Here's a quick sketch I done for the suggested bracket, add the dimennsions to suit. http://i707.photobucket.com/albums/ww76/SJUAE/Kicker/kickerbracket.jpg You could space the 2 supports so that the cover the existing holes. I suggest the top 4 bolts are through the transom and the bottom 4 can be screws if there is wood behind. I have shown a wooden pad so you can clamp for easy removal of the kicker but this could be a plate. Any good bike shop should be able to fabricate this for you in SS (not swim platform BTW :)). Regards Steve