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Author Topic:   power for 9 foot whaler tender

gregc posted 08-13-2002 04:21 PM ET (US)
I just bought a 9 foot whaler tender( not the squall).. needs some TLC but seems in good shape... coast guard plate calls for 5 hp max but transom has been drilled which leads me to suspect a bigger motor has been used in past.. the only other 9 footer I have seen has an 8 hp motor on it but I have never seen the owner... question is has anyone any experience with the boat and what is their opinion of a 6 hp or 8 hp motor or should I just stick with a 5 hp? Thanks
11 footer posted 08-13-2002 04:42 PM ET (US)
have an 8hp for sale.
JBCornwell posted 08-13-2002 05:47 PM ET (US)
Stick with 5 or less. The smaller a boat is the more sensitive it is to too much power.
Red sky at night. . .
JB :)
gregc posted 08-13-2002 05:49 PM ET (US)
I am probably not going to make a move until I igure out what size motor I should use but it would be helpful if you could tell me a little bit about your 8 hp for sale. Thanks
SpeedyWhaler posted 08-13-2002 09:17 PM ET (US)
If you want your boat to get on plane (which is it not designed) you'll need at least an 8. If your're not interested in getting on plane then dont bother with more than 5hp.
11 footer posted 08-14-2002 12:29 PM ET (US)
My 8hp is a rebuilt 1988 mercury. short shaft. had it on my 11' whaler then replaced it with a biger one. Put a tiller on it. The tiller came off of an 1990 15hp the (tiller has 3 hours on it) The outboard has never had a prolbem I would keep it but I have no other boat to put it on. Till the last 3 years it was used in a fresh water lake in Maine it was on my whaler when i got it. used in salt water here but well flushed and was not left in the water. would come with 1 5gallon gas tank and a gas line.
Rodger posted 08-14-2002 12:47 PM ET (US)
Hi gregc,
I started with a Honda 7.5 on my 9' tender and it would plane with one person. I then changed the cam in the engine and it put out 10 hp. The boat would then plane with 2 people and was a great set up. Eventually a 25 hp Merc was bolted to the back and converted the 9' tender to a 9' rocket. There is a photo of it at http://home.pacifier.com/~randb/BostonWhaler.htm
Of course the 25 is way too much power and is not recommended.
DaveH posted 08-14-2002 01:32 PM ET (US)
Roger:
I thought I saw the most overpowered whaler in the late '70's: a 15' sport with a 115Hp Merc (yes, the big inline). I must now give you the crown for the absolute craziest display of a floating engine to ever wear the foam hull. Wish I could drive it for an hour. BTW, I gotsta know, how fast?
SpeedyWhaler posted 08-14-2002 03:02 PM ET (US)
DaveH, I can't speek for rodger but I have a 9' Whaler with a 2001 25HP merc, a 6" setback jack plate and trim tabs and custom steering, throttle controls mounted on the seat-bench. The top speed is (gps) is 41mph, that is in perfect conditions (light chop with a 10kt head wind).
As for gregc I would sugest 5 hp....and anything more than that you're just wasting fuel.
DaveH posted 08-14-2002 03:16 PM ET (US)
Roger, pass the crown to Speedywhaler. He's a sick puppy ;)
Bigshot posted 08-14-2002 04:19 PM ET (US)
Was ON a 15' in Barbados with a 115 Evinrude ocean Pro. Absolutely sick! Not a stress carck on it and all they used it for was waterskiing. 1978 hull with a 1998 engine.
Rodger posted 08-14-2002 04:24 PM ET (US)
DaveH,
I agree, SpeedyWhaler gets the crown! I didn't think anyone else was crazy enough to put a 25 on a 9'. We sold our 9' rocket after I flipped the boat and made S's out of the rods (water does not compress very well). Be careful SW
LiquidDiet posted 08-14-2002 07:15 PM ET (US)
A 25hp Merc is insane on a 9ft tender, my dockmaster has one and he is in constant danger of flipping. Trying to lift that little tender by way of a davit is a handful and a half (it tips and leans very bad). My suggestion is to get a 6hp or 8hp twin cyclinder, that way it is light enough to move around, but powerful enought to plane off.
LD
Swellmonster posted 08-14-2002 11:07 PM ET (US)
Dont know whether to buy speedywhaler a cup of coffee, a beer, or a straightjacket! (:D
bocaspiff posted 08-15-2002 08:01 AM ET (US)
I sold a 1976 Newport with a 115 Yamaha 2 years ago. Boat ran 52 with 1 person, 2 gallons of gas, notched up 2 holes, and a screaming roostertail. I just bought an 88 Montauk with a 100 GT with shaved heads, we'll see, still sanding the teak before we varnish it.
bocaspiff posted 08-15-2002 08:02 AM ET (US)
Swellmonster,
Are you the guy with the 18 jumping those huge waves on the West Coast?
Swellmonster posted 08-15-2002 09:46 AM ET (US)
Boca,
Check my profile, and yepper, that is where my name comes from!
bocaspiff posted 08-15-2002 10:44 AM ET (US)
All hail to the jumper of Pacific Swells!
bocaspiff posted 08-15-2002 10:47 AM ET (US)
Swellmonster
About 5 years ago I was jumping some 6' swells in Boca Inlet and getting absolutley stupid air. I went vertical, submarined the 115 Yamaha, and the fuel tank (28g plastic) pinched the fuel line and stalled the motor. Didn't sink of course, but swamped the boat with a dozen good sized waves before getting towed in by 2 Waverunners. No damage to boat or motor
Bigshot posted 08-15-2002 10:58 AM ET (US)
Lesson #1....NEVER jump into the wind.
Lesson #2...if you do get vertical and lose the gas tanks out the back....get them before the engine runs out of gas.
Lesson #3....If you do flip, tell your father it was stolen.
bocaspiff posted 08-15-2002 11:25 AM ET (US)
1. Thank God there was no wind, just swells!
2. Unfortunately, I didn't notice the loose tank.
3. Dad wasn't home, had boat cleaned before he got there
bocaspiff posted 08-15-2002 11:28 AM ET (US)
I had a friend with a 15-70 OMC who used to jump like a maniac. I watched him get vertical, lose the fuel tank, and spin around before he was out of gas and pick it back up!
gregc posted 08-15-2002 12:52 PM ET (US)
In my wildest dreams, I had never considered a 25hp on the 9 foot tender, my 13 foot whaler uses a 25 and I know of more than a few with a 15hp mounted on the 13 footer,
the answers I got from you all seem to be about evenly split between 5hp and a 6 or 8.
Accordingly, I'll probably make the decision based to some extent on price. Thank you all for your time and please let me know of any further insights.
Bigshot posted 08-15-2002 01:20 PM ET (US)
Boca...read rule #2.
Did that in Barnegat inlet after hitting a 6' breaker in a 13. Lost both tanks out the back. had to retrieve quickly, then worry about explaining where the anchor went.
Dad busted me riding the surf one day.....how the hell did I know he would be working on the roof of the house. Nothing more exciting than dropping in...in a whaler, just like surfing...kinda.
DaveH posted 08-15-2002 02:58 PM ET (US)
I guess that the Marketing Suits at Whaler never thought about the converse situation: saving the whaler from the 13 year old kid! Bigshot, this means you. BTW, I get this vision of you riding the big surf (35-40') on the North Shore of Hawaii, with this huige grin on your face.
Bigshot posted 08-15-2002 04:01 PM ET (US)
Ever get closed up on a reef? Will break even a BW in half....pus I don't like Tiger sharks:)
11 footer posted 08-15-2002 05:25 PM ET (US)
greg my outboard is still up for sale
bocaspiff posted 08-16-2002 09:15 AM ET (US)
BigShot,
We're not worthy,
We're not worthy,
We're not worthy,
Just got a 21" Vengeance 4 Blade for my Montauk last night :).
Swellmonster posted 08-16-2002 11:03 AM ET (US)
F*** the gas tanks, watch out for the beer!
Bigshot posted 08-16-2002 01:10 PM ET (US)
Ditto!
Gas tanks float.
Boca...you seem worthy, I'm too old for this crap now, probably get shin splints or something.
bocaspiff posted 08-16-2002 01:48 PM ET (US)
BigShot
I replied to your ? about the RMS: 51 at 5100 rpm, but it handled like crap. No steering, unbelievable torque and it would blow out with any wake.
SpeedyWhaler posted 06-29-2014 10:11 AM ET (US)
12 years later im bit more grown up. Now I have a 15ft whaler with 90 yamaha.....still miss the 9 though

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Author	Topic: power for 9 foot whaler tender
gregc	posted 08-13-2002 04:21 PM ET (US) I just bought a 9 foot whaler tender( not the squall).. needs some TLC but seems in good shape... coast guard plate calls for 5 hp max but transom has been drilled which leads me to suspect a bigger motor has been used in past.. the only other 9 footer I have seen has an 8 hp motor on it but I have never seen the owner... question is has anyone any experience with the boat and what is their opinion of a 6 hp or 8 hp motor or should I just stick with a 5 hp? Thanks
11 footer	posted 08-13-2002 04:42 PM ET (US) have an 8hp for sale.
JBCornwell	posted 08-13-2002 05:47 PM ET (US) Stick with 5 or less. The smaller a boat is the more sensitive it is to too much power. Red sky at night. . . JB :)
gregc	posted 08-13-2002 05:49 PM ET (US) I am probably not going to make a move until I igure out what size motor I should use but it would be helpful if you could tell me a little bit about your 8 hp for sale. Thanks
SpeedyWhaler	posted 08-13-2002 09:17 PM ET (US) If you want your boat to get on plane (which is it not designed) you'll need at least an 8. If your're not interested in getting on plane then dont bother with more than 5hp.
11 footer	posted 08-14-2002 12:29 PM ET (US) My 8hp is a rebuilt 1988 mercury. short shaft. had it on my 11' whaler then replaced it with a biger one. Put a tiller on it. The tiller came off of an 1990 15hp the (tiller has 3 hours on it) The outboard has never had a prolbem I would keep it but I have no other boat to put it on. Till the last 3 years it was used in a fresh water lake in Maine it was on my whaler when i got it. used in salt water here but well flushed and was not left in the water. would come with 1 5gallon gas tank and a gas line.
Rodger	posted 08-14-2002 12:47 PM ET (US) Hi gregc, I started with a Honda 7.5 on my 9' tender and it would plane with one person. I then changed the cam in the engine and it put out 10 hp. The boat would then plane with 2 people and was a great set up. Eventually a 25 hp Merc was bolted to the back and converted the 9' tender to a 9' rocket. There is a photo of it at http://home.pacifier.com/~randb/BostonWhaler.htm Of course the 25 is way too much power and is not recommended.
DaveH	posted 08-14-2002 01:32 PM ET (US) Roger: I thought I saw the most overpowered whaler in the late '70's: a 15' sport with a 115Hp Merc (yes, the big inline). I must now give you the crown for the absolute craziest display of a floating engine to ever wear the foam hull. Wish I could drive it for an hour. BTW, I gotsta know, how fast?
SpeedyWhaler	posted 08-14-2002 03:02 PM ET (US) DaveH, I can't speek for rodger but I have a 9' Whaler with a 2001 25HP merc, a 6" setback jack plate and trim tabs and custom steering, throttle controls mounted on the seat-bench. The top speed is (gps) is 41mph, that is in perfect conditions (light chop with a 10kt head wind). As for gregc I would sugest 5 hp....and anything more than that you're just wasting fuel.
DaveH	posted 08-14-2002 03:16 PM ET (US) Roger, pass the crown to Speedywhaler. He's a sick puppy ;)
Bigshot	posted 08-14-2002 04:19 PM ET (US) Was ON a 15' in Barbados with a 115 Evinrude ocean Pro. Absolutely sick! Not a stress carck on it and all they used it for was waterskiing. 1978 hull with a 1998 engine.
Rodger	posted 08-14-2002 04:24 PM ET (US) DaveH, I agree, SpeedyWhaler gets the crown! I didn't think anyone else was crazy enough to put a 25 on a 9'. We sold our 9' rocket after I flipped the boat and made S's out of the rods (water does not compress very well). Be careful SW
LiquidDiet	posted 08-14-2002 07:15 PM ET (US) A 25hp Merc is insane on a 9ft tender, my dockmaster has one and he is in constant danger of flipping. Trying to lift that little tender by way of a davit is a handful and a half (it tips and leans very bad). My suggestion is to get a 6hp or 8hp twin cyclinder, that way it is light enough to move around, but powerful enought to plane off. LD
Swellmonster	posted 08-14-2002 11:07 PM ET (US) Dont know whether to buy speedywhaler a cup of coffee, a beer, or a straightjacket! (:D
bocaspiff	posted 08-15-2002 08:01 AM ET (US) I sold a 1976 Newport with a 115 Yamaha 2 years ago. Boat ran 52 with 1 person, 2 gallons of gas, notched up 2 holes, and a screaming roostertail. I just bought an 88 Montauk with a 100 GT with shaved heads, we'll see, still sanding the teak before we varnish it.
bocaspiff	posted 08-15-2002 08:02 AM ET (US) Swellmonster, Are you the guy with the 18 jumping those huge waves on the West Coast?
Swellmonster	posted 08-15-2002 09:46 AM ET (US) Boca, Check my profile, and yepper, that is where my name comes from!
bocaspiff	posted 08-15-2002 10:44 AM ET (US) All hail to the jumper of Pacific Swells!
bocaspiff	posted 08-15-2002 10:47 AM ET (US) Swellmonster About 5 years ago I was jumping some 6' swells in Boca Inlet and getting absolutley stupid air. I went vertical, submarined the 115 Yamaha, and the fuel tank (28g plastic) pinched the fuel line and stalled the motor. Didn't sink of course, but swamped the boat with a dozen good sized waves before getting towed in by 2 Waverunners. No damage to boat or motor
Bigshot	posted 08-15-2002 10:58 AM ET (US) Lesson #1....NEVER jump into the wind. Lesson #2...if you do get vertical and lose the gas tanks out the back....get them before the engine runs out of gas. Lesson #3....If you do flip, tell your father it was stolen.
bocaspiff	posted 08-15-2002 11:25 AM ET (US) 1. Thank God there was no wind, just swells! 2. Unfortunately, I didn't notice the loose tank. 3. Dad wasn't home, had boat cleaned before he got there
bocaspiff	posted 08-15-2002 11:28 AM ET (US) I had a friend with a 15-70 OMC who used to jump like a maniac. I watched him get vertical, lose the fuel tank, and spin around before he was out of gas and pick it back up!
gregc	posted 08-15-2002 12:52 PM ET (US) In my wildest dreams, I had never considered a 25hp on the 9 foot tender, my 13 foot whaler uses a 25 and I know of more than a few with a 15hp mounted on the 13 footer, the answers I got from you all seem to be about evenly split between 5hp and a 6 or 8. Accordingly, I'll probably make the decision based to some extent on price. Thank you all for your time and please let me know of any further insights.
Bigshot	posted 08-15-2002 01:20 PM ET (US) Boca...read rule #2. Did that in Barnegat inlet after hitting a 6' breaker in a 13. Lost both tanks out the back. had to retrieve quickly, then worry about explaining where the anchor went. Dad busted me riding the surf one day.....how the hell did I know he would be working on the roof of the house. Nothing more exciting than dropping in...in a whaler, just like surfing...kinda.
DaveH	posted 08-15-2002 02:58 PM ET (US) I guess that the Marketing Suits at Whaler never thought about the converse situation: saving the whaler from the 13 year old kid! Bigshot, this means you. BTW, I get this vision of you riding the big surf (35-40') on the North Shore of Hawaii, with this huige grin on your face.
Bigshot	posted 08-15-2002 04:01 PM ET (US) Ever get closed up on a reef? Will break even a BW in half....pus I don't like Tiger sharks:)
11 footer	posted 08-15-2002 05:25 PM ET (US) greg my outboard is still up for sale
bocaspiff	posted 08-16-2002 09:15 AM ET (US) BigShot, We're not worthy, We're not worthy, We're not worthy, Just got a 21" Vengeance 4 Blade for my Montauk last night :).
Swellmonster	posted 08-16-2002 11:03 AM ET (US) F*** the gas tanks, watch out for the beer!
Bigshot	posted 08-16-2002 01:10 PM ET (US) Ditto! Gas tanks float. Boca...you seem worthy, I'm too old for this crap now, probably get shin splints or something.
bocaspiff	posted 08-16-2002 01:48 PM ET (US) BigShot I replied to your ? about the RMS: 51 at 5100 rpm, but it handled like crap. No steering, unbelievable torque and it would blow out with any wake.
SpeedyWhaler	posted 06-29-2014 10:11 AM ET (US) 12 years later im bit more grown up. Now I have a 15ft whaler with 90 yamaha.....still miss the 9 though