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Author Topic:   Repower 11' whaler
fourpaws posted 08-30-2004 10:15 PM ET (US)   Profile for fourpaws   Send Email to fourpaws  
Am looking to repower an 11' whaler which is currently powered with a 15 hp Johnson. Considering a 20hp, electric start Honda. Has anyone completed a similar repower? Am concerned about how she'll float with the extra weight. Any advice/suggestions welcomed.
PeteB88 posted 08-30-2004 10:36 PM ET (US)     Profile for PeteB88  Send Email to PeteB88     
I am about to do the same. EVerything I hear indicates a 20 works great. I assume the Honda is 4 str and have heard they could be heavy for the 11.5. There are owers who have told be Yamaha 15s are perfect - - others say older 2 str Johnson 25s are best - lighter too. If you are where I live there is a place that lets you test motors - only if you buy however- they are fair on exchange if one doesn't work out which is cool.

I should be testing a 25 on Wed. I'll let you know. Is your boat tiller or wheel?

ole_mick posted 08-30-2004 11:11 PM ET (US)     Profile for ole_mick  Send Email to ole_mick     
I'm in the same boat (no pun intended). I'm about to bite the 20HP Honda bullet ($3300 is the best price I can find in this area) -- probably within the next week or two. The only other "new" solution I see (w/o going over the 20HP rating) is the 18HP Nissan/Tohatsu 4-stroke -- but I don't know anyone that has one on an 11.

The Honda weight is more than my current Johnson 2-smoke (20 HP) -- but not way over (approximately 20 lbs). The Nissan/Tohatsu comes in around $2500 and is okay in the weight department, but only has a 323cc engine compared the the 350 in the Honda -- so there might be a perceptible performance difference. Who knows?

25HP 4-strokes seem to be way too much weight -- and those with power t/t require the bottom two mounting bolts (which presents a whole new set of problems w/this transom). A new Mercury 25HP 2-stroke (around $2600) has about the same weight as the Honda and Tohatsu, but more power (although over the boat's rating).

Either way, a lot of money for a small motor and not a lot of room to play with on weight/power/performance. I'm interested any any repower info on these boats also.

surveyingdawg posted 09-06-2004 07:34 PM ET (US)     Profile for surveyingdawg  Send Email to surveyingdawg     
I have a 25 Evinrude '85 model on mine with no weight problems. I am going to a Honda 4 stroke soon. I have seen guys run 35s on these things with no probs. I regulary run 3 grown adults including myself and could not imagine anything smaller than a 20hp doing the job. The Honda is going to be a 30. I would rather repower with to much and run conservative, than regret not having enough. Just my 2 cents
Perry posted 09-06-2004 08:54 PM ET (US)     Profile for Perry  Send Email to Perry     
At a little over 100 lbs. the new 20 HP Honda would be a nice match for an 11 footer.
ole_mick posted 09-06-2004 09:07 PM ET (US)     Profile for ole_mick  Send Email to ole_mick     
I ordered the Honda BF20 this weekend. I'll let you know how it turns out. My Johnson 20 seemed to be enough power for me, so I think this will be okay. I carry a lot of gear on mine so weight was a concern. I like the Hondas, that is, once you get over the sticker shock.
PeteB88 posted 09-12-2004 11:15 PM ET (US)     Profile for PeteB88  Send Email to PeteB88     
I put an older Johnson 25 on my 11.5 (actually same year - I kinda wanted the same vintage) and it screams if I need it to, trolls if I need it to, gets on plane with a load in the boat and I can throttle back to a nice cruise w/ about 60% throttle - 75% is actually a bit better and if I need to get it on, WOT and the nose settles down for business and it flys. No idea of top speed but that is not important. It sips gas because it doesn't have to work that hard. However ya all better hang on when you open it up. I use the power to get on plane and throttle back to a nice cruise.

The problem is my 11.5 ain't MY boat anymore. I had committed to buy a 13 w/ Yamaha 40, as did the owner, who backed out of the deal for no good reason. Now, I do not have a boat because, like many Whaler owners, someone is always after you to sell. I did the 13 guy backed out and I think that is unacceptable. I am still hopeful he might reconsider.

Enjoy your 11 - - power it up. IF it has console that's even better because you got something to hang on to.


ole_mick posted 09-13-2004 01:23 PM ET (US)     Profile for ole_mick  Send Email to ole_mick     
Pete -- sorry to hear about the 13' deal. Boat-less in no way to be. I bet the Johnson 25 does scream, I know my 20 Johnson had more than enough for me. I get my Honda BF20 4-stroke mounted this week. We'll see as to performance as soon as I get through the break-in period.
13_Dauntless posted 09-13-2004 07:13 PM ET (US)     Profile for 13_Dauntless  Send Email to 13_Dauntless     
I used to have an 11 Sport with a Johnson 20(1990 model). The boat ran 25-28 mph at WOT (no tach) depending on load. It would plane with two people, but with three adults in the boat it wouldn't plane at all. I saw an 11 with tiller steering that had a Honda 25. It seemed to float fine; it wasn't visibly stern heavy. If I had another, I'd power it with a two stroke 30 hp.
PeteB88 posted 09-15-2004 05:28 AM ET (US)     Profile for PeteB88  Send Email to PeteB88     
I couldn't imagine a 30 ho on a 11.5 after running the 25. Over 20 on the older motors you lose features like light weight and shallow water drive but I could hold it up manually to get through skinny water.

My 11.5 sat in the water as perfectly as one could hope for w/ 25 on stern. I was certain it would be transom heavy w/ the 25. Moreover, i could lift the 25 on and off without much problem AND if I was going to fish a no wake or sub 10 hp lake I could run with the old 9.5 botta boom botta bing.

The new guy, who I know, wants to stick to my plan to convert from tiller to console. I am trying to help do that and will continue looking for a used console or other solution. Hang on to that boat when it takes off!!

PeteB88 posted 09-15-2004 05:40 AM ET (US)     Profile for PeteB88  Send Email to PeteB88     
One more thing - - I would be very cautious about handing over the 11.5 w/ 25 hp tiller to any kid to drive let alone a 30hp. The performance esp manuevering is so quick it you gotta know what you're doing. Perhaps w/ console controls for good balance and something to hang on to.
Jonathan posted 09-16-2004 08:24 PM ET (US)     Profile for Jonathan  Send Email to Jonathan     
I put a light weight 2cyl Mercury 30hp (106lbs)on my 11.5. It was a pull start which is a weight saving. My priority was high power to weight. I had it set up as a forward steer but a tiller dampener would also be suitable if you wanted to free up the deck.
oysterman posted 09-16-2004 11:13 PM ET (US)     Profile for oysterman  Send Email to oysterman     
I used to have a early 90's 11 sport with a 25 horse Evinrude. It was a great boat and that 25 pushed it pretty quick. It was great taking the kids skiing or tubing. A 20 horse or better will be a good choice.
PeteB88 posted 09-18-2004 12:07 AM ET (US)     Profile for PeteB88  Send Email to PeteB88     

What is a tiller dampener? THX

Phil Tyson posted 09-18-2004 08:00 AM ET (US)     Profile for Phil Tyson  Send Email to Phil Tyson     
My brother runs a Honda 20 on his non-whaler boat. It is a sweet engine. Purs like a kitten, great mileage, VERY quiet. Starts easily (manual start), even at -15 below.
tvoltz posted 05-29-2008 08:32 PM ET (US)     Profile for tvoltz  Send Email to tvoltz     
So how did the honda 20 work out?

I'm in the same sit. Looking to repower my 11 sport - probably with a 20hp or less. What lenght shaft is recommended. There are a few more options if I can do a long shaft

Tohsgib posted 05-30-2008 11:11 AM ET (US)     Profile for Tohsgib  Send Email to Tohsgib     
15" shaft. Now there are a few more options. I think Honda, Yamaha, and Tohatsu/Mercury all make a 20hp now.

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