Well, we had another problem with Wiliwa yesterday. the transom is insufficiently reinforced for the OB mount. Underway the transom is visibly oil canning. There is a large plywood backing plate on the inside but no reinforcement on the outside. We think that the transom needs more reinforcing on the outside, perhaps an aluminum plate. the engine is a Yamaha 4 stroke, 15hp unit.Having no experience with OB motors, I turn to the group for advice.
Reinforcing Transom for Outboard Motor Mount (Wiliwa)
- Thread starter vega1860
- Start date
IF it were me I would add a piece if 3/4 or 1" plywood on the
inside. You get just as much strength inside or out and You won't
ruin the looks of the stern. All it takes is some epoxy or glue and
some longer bolts.
--
Doug Pollard
Albin Vega Sea Legs 2225
KK4YGO
On 06/17/2014 01:55 PM,
chuck@... [AlbinVega] wrote:
inside. You get just as much strength inside or out and You won't
ruin the looks of the stern. All it takes is some epoxy or glue and
some longer bolts.
--
Doug Pollard
Albin Vega Sea Legs 2225
KK4YGO
On 06/17/2014 01:55 PM,
chuck@... [AlbinVega] wrote:
i dare say its the size of the engine. we had a 6 hp, 2 stroke 25 kgr ob. never showed strain in the transome. although the engine mounting broke in different places at least 3 times all in cross seas n only 1 under power. we placed the ob on the starboard side since we have a 25kgr windvane in the center n that has a 4ft square, 3mm stainless steel shapped backing plate.
I have reinforced my transom and aft deck. It would be wise to tie the aft deck, transom and the hull together. In doing this you transfer the load across a large cross section of your transom. I pulled this boat apart to see how or what they did at the factory, I was not impressed at what was really holding the transom from flexing. You might think about using 1708 biaxial fiber glass and use an epoxy resin system to apply. Make sure you roll up the full transom, and onto the aft deck above…do the same at the hull floor and sides…let the fiberglass lap over the areas around the transom a good 6”. Two layups of the 1708 biaxial fiberglass will make all the difference in the strength of your transom. I would then add your Stainless Steel backing plate on the inside of the transom. I was shocked how strong this little add truly was. That is my two cents. Larry Lily Two v-2761 Sent from Windows MailFrom: n4lbl alan.schulman@... [AlbinVega]Sent: Tuesday, June 17, 2014 3:25 PMTo: n4lbl alan.schulman@... [AlbinVega]
i dare say its the size of the engine. we had a 6 hp, 2 stroke 25 kgr ob. never showed strain in the transome. although the engine mounting broke in different places at least 3 times all in cross seas n only 1 under power. we placed the ob on the starboard side since we have a 25kgr windvane in the center n that has a 4ft square, 3mm stainless steel shapped backing plate.
i dare say its the size of the engine. we had a 6 hp, 2 stroke 25 kgr ob. never showed strain in the transome. although the engine mounting broke in different places at least 3 times all in cross seas n only 1 under power. we placed the ob on the starboard side since we have a 25kgr windvane in the center n that has a 4ft square, 3mm stainless steel shapped backing plate.
Roger,I've forgotten where you sail. What model bracket do you use for the outboard? and how long is the travel? I have a 9.8 Nissan two stroke on the port side of my Vega. I'm out of San Diego.To: albinvega@yahoogroups.comFrom: AlbinVega@yahoogroups.comDate: Tue, 17 Jun 2014 23:25:14 +0100Subject: Re: [AlbinVega] Reinforcing Transom for Outboard Motor Mount (Wiliwa)
i dare say its the size of the engine. we had a 6 hp, 2 stroke 25 kgr ob. never showed strain in the transome. although the engine mounting broke in different places at least 3 times all in cross seas n only 1 under power. we placed the ob on the starboard side since we have a 25kgr windvane in the center n that has a 4ft square, 3mm stainless steel shapped backing plate.
i dare say its the size of the engine. we had a 6 hp, 2 stroke 25 kgr ob. never showed strain in the transome. although the engine mounting broke in different places at least 3 times all in cross seas n only 1 under power. we placed the ob on the starboard side since we have a 25kgr windvane in the center n that has a 4ft square, 3mm stainless steel shapped backing plate.
hi Bruce, i use to sail in the englísh channel n gibralartar straits. model not sure but its meant to b 10 hp proof. travel distance. about 45 cm.
Chuck, Lyric had a 9.9 Nissan for a couple of years with the same set up. I replaced the plywood with 5/16" by 5"oak baseboard running from the transom deck joint to the transom hull joint. We through bolted two boards with epoxy through the old plywood holes where the bracket attached and let it harden The next day we repeated the process. We did it four times using the bolts to laminate each piece of the oak to the contour of the stern. Very strong set up but might be difficult underway or out in the boonies. Walt To: AlbinVega@yahoogroups.comFrom: AlbinVega@yahoogroups.comDate: Tue, 17 Jun 2014 10:55:48 -0700Subject: [AlbinVega] Reinforcing Transom for Outboard Motor Mount (Wiliwa)
Well, we had another problem with Wiliwa yesterday. the transom is insufficiently reinforced for the OB mount. Underway the transom is visibly oil canning. There is a large plywood backing plate on the inside but no reinforcement on the outside. We think that the transom needs more reinforcing on the outside, perhaps an aluminum plate. the engine is a Yamaha 4 stroke, 15hp unit.Having no experience with OB motors, I turn to the group for advice.
Well, we had another problem with Wiliwa yesterday. the transom is insufficiently reinforced for the OB mount. Underway the transom is visibly oil canning. There is a large plywood backing plate on the inside but no reinforcement on the outside. We think that the transom needs more reinforcing on the outside, perhaps an aluminum plate. the engine is a Yamaha 4 stroke, 15hp unit.Having no experience with OB motors, I turn to the group for advice.
P.S. to last post. Oak comes smooth sanded and needs to be rough sanded to get good adhesion with epoxy. Walt To: albinvega@yahoogroups.comFrom: AlbinVega@yahoogroups.comDate: Wed, 18 Jun 2014 16:26:10 +0000Subject: RE: [AlbinVega] Reinforcing Transom for Outboard Motor Mount (Wiliwa)
Chuck, Lyric had a 9.9 Nissan for a couple of years with the same set up. I replaced the plywood with 5/16" by 5"oak baseboard running from the transom deck joint to the transom hull joint. We through bolted two boards with epoxy through the old plywood holes where the bracket attached and let it harden The next day we repeated the process. We did it four times using the bolts to laminate each piece of the oak to the contour of the stern. Very strong set up but might be difficult underway or out in the boonies. Walt To: AlbinVega@yahoogroups.comFrom: AlbinVega@yahoogroups.comDate: Tue, 17 Jun 2014 10:55:48 -0700Subject: [AlbinVega] Reinforcing Transom for Outboard Motor Mount (Wiliwa)
Well, we had another problem with Wiliwa yesterday. the transom is insufficiently reinforced for the OB mount. Underway the transom is visibly oil canning. There is a large plywood backing plate on the inside but no reinforcement on the outside. We think that the transom needs more reinforcing on the outside, perhaps an aluminum plate. the engine is a Yamaha 4 stroke, 15hp unit.Having no experience with OB motors, I turn to the group for advice.
Chuck, Lyric had a 9.9 Nissan for a couple of years with the same set up. I replaced the plywood with 5/16" by 5"oak baseboard running from the transom deck joint to the transom hull joint. We through bolted two boards with epoxy through the old plywood holes where the bracket attached and let it harden The next day we repeated the process. We did it four times using the bolts to laminate each piece of the oak to the contour of the stern. Very strong set up but might be difficult underway or out in the boonies. Walt To: AlbinVega@yahoogroups.comFrom: AlbinVega@yahoogroups.comDate: Tue, 17 Jun 2014 10:55:48 -0700Subject: [AlbinVega] Reinforcing Transom for Outboard Motor Mount (Wiliwa)
Well, we had another problem with Wiliwa yesterday. the transom is insufficiently reinforced for the OB mount. Underway the transom is visibly oil canning. There is a large plywood backing plate on the inside but no reinforcement on the outside. We think that the transom needs more reinforcing on the outside, perhaps an aluminum plate. the engine is a Yamaha 4 stroke, 15hp unit.Having no experience with OB motors, I turn to the group for advice.
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A lot of people have been using "Starboard" (high density polypropylene) for backing plates. Seems like it
might be a good choice since it doesn't compress or rot..
Garry
V. 2427
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A lot of people have been using "Starboard" (high density polypropylene) for backing plates. Seems like it
might be a good choice since it doesn't compress or rot..
Garry
V. 2427