Author
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Topic: 1968 13' Transom
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Sojo81007 |
posted 08-13-2011 12:23 PM ET (US)
A few weeks ago I asked whether or not it would be OK to mount a 1981 50hp Mercury on a '68 Whaler 13. I have since actually got the boat (on CL, hadn't seen it) and now I'm wondering if that big motor is going to crack the transom. There are a lot of spider cracks on the boat, and some large ones in the splash well area. It has the original (I believe) 1968 Fastwin 18hp that came with it. I haven't had it on the water (lost a wheel bearing and it's still in OH at my uncles...fun, fun!, but I don't think 18hp is going to make me happy. Has anyone actually put a 50 on the older style transoms? Has anybody reinforced it to handle the extra 30-40 pounds and 10hp? Has anybody busted a transom? :) Just asking....I'm thinking that a 35 would be a nice motor....but I have to find one. Thanks!
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dowdhh
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posted 08-14-2011 08:35 AM ET (US)
It's not that rare to see a 50hp on a 13. But, you left out allot of info. Is your 50hp a 15" or 20" shaft? Has the transom notch been filled? Is the wood in the transom solid? I have mid 1960's 13' with a 25 Johnson (20") mounted on a Mini Jack plate. I was getting some serious cracks in the corners of the transom. So, I filled the notch, reinforced the corners and remounted the bracket and motor about an 1-1/2'S higher, now all's well. Personaly, I would not put a 50hp motor on my old Whaler, I might put one on a newer (80's) Whaler. Go with the 35hp, performance will be great, you should be able to hit 35mph depending on your load. Try the old 18hp Fastwin for a while. You might be surprised! Good luck! |
leadsled
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posted 08-14-2011 08:39 AM ET (US)
I Ran a 50 mercury for 6-7 years on my 1968 whaler back when the boat was only 10 years old. I replaced it with a new 50 merc and ran that for 4-5 years and traded it in for a 35 evinrude and ran that for a while and replaced it with a 30 johnson and later put a 25 tohatsu. With a light load a 25 to 35 is plenty of power. The late 1980's Evinrude and Johnson 30 and 35's are a good engine to look for and are light ( about 115 pounds ). |
Sojo81007
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posted 08-14-2011 01:47 PM ET (US)
The notch is not filled, and I don't know about the condition of the wood. The transom has fine spider cracking all over, with some thicker cracks in the splash well area and other places.I have a 15" Merc 50hp which weighs 170 lbs dry. The thing is, a 25hp Merc 4stroke weighs the exact same! The 35-40 hp 2 strokes typically weigh 130-140. I'm just not sure what to do...we like to tube and like to have 4 people in the boat at times so I feel that I really do need the xtra HP. If I was just fishing and cruising I would be happy with the small motor. A 25hp isn't going to plane the boat and a tube, unless these whalers are amazing or something. I haven't even had it on the lake yet. :) Got a new water pump for the Fastwin - it seems to run good though I think the LU seals could be starting to leak, something that doesn't shock me or anything. |
thegage
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posted 08-14-2011 02:59 PM ET (US)
A 25 will plane and get a tube up, even get a skier up, but it won't be blistering fast, and depending on number/size of people in the boat could be slower/faster to plane. John K. |
dowdhh
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posted 08-14-2011 03:37 PM ET (US)
I agree, my 25hp (2 stroke) will plane quickly and pull a tube fast enough to have fun, with 1 spotter on board. 13' Whaler's are very weight sensitive, greatly affecting performance. I don't realy like more than 3 people including me. If you go with the 50hp, look at the wood on the drill bit when you drill the mounting holes, if it's wet and soft you have a problem. If it's dry you might be OK. Just keep a watchfull eye for new cracks. If you go with any 20" motor, you will need to make some modifications, get a bracket of some kind or both.
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Sojo81007
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posted 08-14-2011 09:04 PM ET (US)
I wonder if anybody has tried two small motors...I thought about trying it just for a random, maybe weird project. If I could pick up another 18hp fastwin of similar year I'd like to see if it's possible. The biggest issue is whether they would both fit in the notch. I think I could sync the steering pretty easily. :) Probably won't do it, but the thought has crossed my mind. |
dowdhh
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posted 08-14-2011 09:20 PM ET (US)
As I said,I have seen 50's on 13's, but I've never seen twins. Interesting idea,I think you would be the first. But you would have to fill the transom, it's not wide enough. Summer is quickly fading, go with the 18hp Fastiwn for now. Have some fun! |
contender
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posted 08-14-2011 09:22 PM ET (US)
The old whaler with the big 50 Mercury will crack the transom, been there done that in the early 60's to race the whaler in a Mike Gordon 100 race in Biscayne Bay. we even fiberglass a new seat in the center of the boat to steer from (we should have fiberglass the transom) had to stop the race or would have lost the engine, No you do not have enough room to put twins (even the 18's) on the notch in the old 13 whaler (I tried that also) |
Mike Kub
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posted 08-14-2011 09:34 PM ET (US)
Twin 18's on a 13'.Come on man.I wonder if they make them with counter-rotating props? I would love to see the face on the salesperson when you ask him. |
Sojo81007
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posted 08-14-2011 10:26 PM ET (US)
I'm replacing the impeller on the Fastwin and do plan on using it like that for the remainder of this season. I'll take the little 3.3 kicker just in case the old motor dies. I also have my 1967 Renken runabout with the 50 that I can use for faster boating. I have to sell some combination of this stuff...I can't keep them both. I'm not exactly rich and my boating hobby has to pay for itself (good look with that, right? haha so far it's actually worked...I look for good deals, do a little work and then sell them to buy the next good deal.) Thanks for all your replies...I'm pretty sure I'm decided against the 50. I'm just gonna sell it and then go from there...hoping to find a 35, but they are pretty rare in the short shaft category from what I'm finding. |
BQUICK
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posted 08-15-2011 03:01 PM ET (US)
I've had a 50 Merc (manual start) on my 71 Sourpuss (notched transom) since new. Been through lots of rough water and run hard. Only some hailine cracks at the corners. However, I suspect the earlier transoms with the full length well may be weaker. |
dg22
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posted 08-18-2011 07:36 PM ET (US)
I have 1972 50hp Evinrude on my 1967 13 footer. My boat had a lot of spider cracks but the original transom seems solid -- just hairline cracks in the corners. I've been running it for 3 years now with no problems. I think my motor weight is 187 lbs. I pull skiers and tubers with it too. |
dowdhh
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posted 08-18-2011 09:30 PM ET (US)
"35hp's are rare in the short shaft catagory" Very true. That's just one reason to fill the transom notch, it will give you a greater choice of motor options, stronger transom, less backwash and other benefits. Run the 18hp for the rest of this quikly ending summer. During the Fall and Spring tackle that project, you will be glad you did. This site will be very helpfull. |
Powergroove803
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posted 08-19-2011 01:29 PM ET (US)
I have a jig to build the transom filler, its big and heavy and will be expensive to ship, but it will be almost(very small degree off)the exact match for the transom. If anyone want it, its free plus shipping. Basically it is a 10x2 about 4 ft long with screwed in blocks at different spots to clamp your laminate onto, pretty simple. The way I made it was to lay the board over the transom, then I took a flexible batten and curved it across the transom, then marked out the curvature with a Sharpie. It is a compound bend though, so you have to keep that in mind, but the curvature gives you a good starting point. |
TommyWhaler
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posted 08-21-2011 06:55 PM ET (US)
In FL, you would not be able to get insurance from a reputable company with a 50 on a 13. It would be overkill, as a 40 is all that hull needs. |
Tohsgib
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posted 08-22-2011 02:14 PM ET (US)
Tommy that is incorrect information about insurance in FL.Weight is not what kills a transom it is HP and how you drive it. Don't mash it out of the hole and jump yacht wakes and you should be fine. Try it. |
TommyWhaler
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posted 08-22-2011 02:40 PM ET (US)
Well, tohsgib, I said reputable. State Farm, for an example, will not write a policy on a boat which has greater HP than it is rated for. |
Tohsgib
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posted 08-22-2011 03:51 PM ET (US)
I thought that is who LHG has his through and boats in FL. I know progressive will and they are reputable. |
dowdhh
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posted 08-22-2011 04:07 PM ET (US)
You guy's put insurance on 13' Whaler's? |
Tohsgib
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posted 08-22-2011 04:46 PM ET (US)
Only liability from my home owners...like $40/yr. |
dowdhh
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posted 08-22-2011 05:53 PM ET (US)
OK,That makes sense. Better safe tha sorry,I should think about doing the same. I've never insured any of my boats. |
Sojo81007
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posted 08-23-2011 07:39 AM ET (US)
Interesting discussion...I took the Whaler out for the 1st time yesterday. The old Fastwin is an amazing motor which surprised me with a first pull start! It IS much slower than my other boat, probably does 17-18mph with just me and my little son. Later I took a friend of mine plus my boy and with motor and gear we had the hull loaded to about 600lbs. It would slowly climb out of the hole and stay on plane, but it was definitely too slow. (And sucked the gas...I don't think it burned any less than the 50 for the amount of running we did!)What did surprise me was the acceleration when it was just me and the little dude :) One of my first thoughts was "a 50hp would flip this thing end over end" :) You definitely could not punch it... That being said, if I can't find a buyer for my 50hp (it is manual start and some ppl just won't go for that), I still my try it but I'd def. want to do something with the transom. It seems that a guy could have an aluminum piece manufactured at a local shop for less than the $500 Transdaptor requires. |
Sojo81007
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posted 08-24-2011 01:39 PM ET (US)
Does anybody know if the NADA Guides weight estimates are correct? I've been looking at a Mercury 35hp 2 stroke 2 cylinder and it weighs in at 148lbs according to NADA. My 50hp weighs in at 170lbs even though it is a 4cylinder and 15hp more. This makes me lean back toward plan A.If I do that I'm really thinking about adding aluminum plates on the inside and outside of the transom notch and then running reinforcement bolts through to the splashwell. Will those two things do anything except for have a psychological effect on me? :) |
contender
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posted 08-24-2011 01:48 PM ET (US)
You need to see a good fiberglass person to have your transom rebuilt(both of them inside and outside), corners especially. Then I would see a custom metal/aluminium shop and tell them what you wish to do. I would have a bracket made that connects both transoms together for the strength. Its not that I do not think one transom can hold it, But the transom will weaken from the wave jumping and just being old... |
Tohsgib
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posted 08-24-2011 02:26 PM ET (US)
Really depends on condition. If she is just OK then make your own transom and make your own reinforcements. The 35/40hp Merc was one of the worst engines they ever made, I would stick with the smooth indestructible 50....the BEST engine Mercury ever made. |
Sojo81007
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posted 08-24-2011 10:08 PM ET (US)
Contender, I have a feeling if I do what you say (which would be best) I'd have more in the modification than I do the boat, trailer, and motor! :) The solution has to be economical...of course busting the transom out isn't exactly that, either :)I think the solution is for me to post some up close pics of the transom inside and out. As previously stated, there are gelcoat cracks throughout the boat, though not man on the transom (a few along the top, none in the motor mount notch.) I'm seriously thinking about getting an aluminum plate for either side of the transom notch (probably have them welded together with a piece at the top) then run the reinforcements to the splashwell. I do like to jump waves, so I want to make it strong. I will probably be more careful, and may even self limit the throttle on the motor so I'm not tempted to open it up. |
Tohsgib
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posted 08-24-2011 10:43 PM ET (US)
Having a 18hp since new means the transom has never been stressed. Again post pics and we'll go from there but be carefull of the "naysayers". |
Waterwonderland
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posted 08-24-2011 11:25 PM ET (US)
So if you try the 50 HP, what is the worst that can happen? You stress the transom and it has to be reinforced...well, maybe the motor falls off. Then you have to redo the transom which is what some are suggesting anyway. For me, I would try to find some inexpensive reinforcement plates and go with that. Maybe tie a line to your motor as well:) Years ago a good deal of jumping with a 35 HP on a smaller boat (11') with a far weaker transom without difficulty but that is merely anecdotal. Good luck. |
Sojo81007
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posted 08-25-2011 11:32 AM ET (US)
Toshgib,You said that the 35-40 hp mercs were terrible, what is wrong with them? There's one that I can pick up for $400, maybe less. It's an 1989 35hp. Thanks! Sojo81007 |
Tohsgib
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posted 08-25-2011 11:43 AM ET (US)
For $400 buy it but I would stick with your 50. The 2cyls were weak and are finicky to say the least. |
Tohsgib
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posted 08-25-2011 12:06 PM ET (US)
Just put the whatever you want on it and call it a day. It might be cheaper and easier for you to sell what you have and buy what you want. |