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Author Topic:   Whaler 13-foot with 9.9-HP Four-stroke

gavin333 posted 08-02-2006 07:29 PM ET (US)
How does a 13-foot Boston Whaler boat with a 9.9-HP four-stroke perform? Thank you.
PeteB88 posted 08-02-2006 11:48 PM ET (US)
I couldn't imagine it, actually.
BOB KEMMLER JR posted 08-03-2006 12:36 AM ET (US)
It would be better than rowing, that's for sure. I ran a 1989 15-HP Gamefisher motor on my father's 13 when we first got it and it would plane off with my father sitting in the bow. Maybe with the right prop a 9.9-HP four-stroke might do the same.
VI Jamie 22 posted 08-03-2006 04:59 AM ET (US)
The 13's I see, assuming it is not waterlogged, can barely plane off with one person using a 15-HP two-stroke. Your rig will be better than rowing.
PeteB88 posted 08-03-2006 09:37 AM ET (US)
What is your intended use of this boat? Where will you be using it? Who will be using it?
Thanks.
appdiver posted 08-11-2006 08:24 AM ET (US)
Used a '58 13-footer with a 9.9 Honda for 8 years as a dock boat towing larger boats around the marina. Smooth, quiet and never made a wake. Not all of us want to chine walk our 13-footers!
brisboats posted 08-12-2006 09:45 AM ET (US)
Gavin,
I have put a year-2000 9.9 Mercury four-stroke tiller on both my 1966 and 1971 13- footer's. I did it at first because my Nephew primarily used the boat and I wanted to slow him down. The boat would plane even with both of us in it but barely. Performance was even worse with me alone at 225 pounds as the boat plowed more and could not drop the bow effectively. A doel fin and just his weight of about 100 pounds and the boat was much better. It even kept him amused for just over a season.
My Nephew boats responsibly now with a 25-HP Yamaha two-stroke on the transom and to my delight uses about the same amount of fuel on a weekend. The 9.9 four-stroke made for a great crabbing motor and was excellent for teaching safe boating to a teenager. The real test though may have been when the boat was down for some minor repair and I asked if he would like the 9.9 back on it. Quick reply was "I'd rather go sailing Uncle B"
Brian
gakirby posted 08-19-2006 11:08 AM ET (US)
To the disbelief of many of you having a 9.9 hp 4-stroke on a 13 footer is actually possible, but not necessarily pretty. I am currently in high school and during the summer I teach sailing at two different yacht clubs. The main one has 3 13' boston whaler classics. They used to have 2-9hp's and 1-15hp engines. Now that those have broken we now must use 2-6hp engines and 1-9hp engine. The 6hp engines are completely useless and wont consider getting anywhere close to a plane unless u jump up and down on the bow with the engine going at WOT and only one person and 3 gallons of gas. The 9hp can plane pretty well with 2 people and 4 gallons of gas (each person under 200), and anything over that it just plows along. All the engines they use are 4 stroke Suzuki's.
Just thought my experiences could add to this thread.
(At my other yacht club they let me use a '84 17' Montauk with a Yammie 70 2-stroke, geuss which boat I like the best. ;) )

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Author	Topic: Whaler 13-foot with 9.9-HP Four-stroke
gavin333	posted 08-02-2006 07:29 PM ET (US) How does a 13-foot Boston Whaler boat with a 9.9-HP four-stroke perform? Thank you.
PeteB88	posted 08-02-2006 11:48 PM ET (US) I couldn't imagine it, actually.
BOB KEMMLER JR	posted 08-03-2006 12:36 AM ET (US) It would be better than rowing, that's for sure. I ran a 1989 15-HP Gamefisher motor on my father's 13 when we first got it and it would plane off with my father sitting in the bow. Maybe with the right prop a 9.9-HP four-stroke might do the same.
VI Jamie 22	posted 08-03-2006 04:59 AM ET (US) The 13's I see, assuming it is not waterlogged, can barely plane off with one person using a 15-HP two-stroke. Your rig will be better than rowing.
PeteB88	posted 08-03-2006 09:37 AM ET (US) What is your intended use of this boat? Where will you be using it? Who will be using it? Thanks.
appdiver	posted 08-11-2006 08:24 AM ET (US) Used a '58 13-footer with a 9.9 Honda for 8 years as a dock boat towing larger boats around the marina. Smooth, quiet and never made a wake. Not all of us want to chine walk our 13-footers!
brisboats	posted 08-12-2006 09:45 AM ET (US) Gavin, I have put a year-2000 9.9 Mercury four-stroke tiller on both my 1966 and 1971 13- footer's. I did it at first because my Nephew primarily used the boat and I wanted to slow him down. The boat would plane even with both of us in it but barely. Performance was even worse with me alone at 225 pounds as the boat plowed more and could not drop the bow effectively. A doel fin and just his weight of about 100 pounds and the boat was much better. It even kept him amused for just over a season. My Nephew boats responsibly now with a 25-HP Yamaha two-stroke on the transom and to my delight uses about the same amount of fuel on a weekend. The 9.9 four-stroke made for a great crabbing motor and was excellent for teaching safe boating to a teenager. The real test though may have been when the boat was down for some minor repair and I asked if he would like the 9.9 back on it. Quick reply was "I'd rather go sailing Uncle B" Brian
gakirby	posted 08-19-2006 11:08 AM ET (US) To the disbelief of many of you having a 9.9 hp 4-stroke on a 13 footer is actually possible, but not necessarily pretty. I am currently in high school and during the summer I teach sailing at two different yacht clubs. The main one has 3 13' boston whaler classics. They used to have 2-9hp's and 1-15hp engines. Now that those have broken we now must use 2-6hp engines and 1-9hp engine. The 6hp engines are completely useless and wont consider getting anywhere close to a plane unless u jump up and down on the bow with the engine going at WOT and only one person and 3 gallons of gas. The 9hp can plane pretty well with 2 people and 4 gallons of gas (each person under 200), and anything over that it just plows along. All the engines they use are 4 stroke Suzuki's. Just thought my experiences could add to this thread. (At my other yacht club they let me use a '84 17' Montauk with a Yammie 70 2-stroke, geuss which boat I like the best. ;) )