[bolger] Re: 4 strokes
I Seth-
In the "read the brochure vein" you're absolutlely right! When I asked my
Oracle of Boating Knowledge, the owner of the boat store, about this
(supposedly conveyed to him by a Mercury Rep) he says "oh, we were just
talking about the 25 and 50 4 stroke Mercury/Yamaha models. I'm going to
grub around and see for myself.
He simply doesn't understand the shame I feel for imparting other than
perfect information over the internet. The shame!
Robert & Amy Lundy
St. Petersburg, fla.
robert@...
amy@...
In the "read the brochure vein" you're absolutlely right! When I asked my
Oracle of Boating Knowledge, the owner of the boat store, about this
(supposedly conveyed to him by a Mercury Rep) he says "oh, we were just
talking about the 25 and 50 4 stroke Mercury/Yamaha models. I'm going to
grub around and see for myself.
He simply doesn't understand the shame I feel for imparting other than
perfect information over the internet. The shame!
Robert & Amy Lundy
St. Petersburg, fla.
robert@...
amy@...
> -----Original Message-----
> From: Seth Macinko [mailto:macinkos@...]
> Sent: January 13, 2000 10:24 AM
> To:bolger@...
> Subject: [bolger] Re: 4 strokes
>
>
> Just as I was shopping around for outboards for a Tennessee, along
> comes this thread! But I surely am confused (it doesn't take much).
> "Yamaha makes the Mecury 4 strokes" Really? I know there are all kinds
> of cross manufacturing arrangements but what puzzles me are the
> following specs (All drawn from each manufacturer's product lit or web
> sites except for the bore/stroke info on Yamaha which came from a
> competitors site--I haven't yet looked up data on Nissan--apologies to
> all for mixing imperial and metric units, displacement and bore/stroke
> are metric, propeller diameter and pitch are in inches, pounds are
> pounds):
>
> Make model displ borexstoke
> prop(diaxpitch) Gear ratio weight
> Yamaha 9.9 HT 232 59x40 ?
> 2.92 99 lbs
> Yamaha 9.9 232 59x40 ?
> 2.08 91 lbs
> Mercury 9.9 HT 323 59x59 10 3/8x9 1/2
> 2.42 128 lbs
> Mercury 9.9 323 59x42 9x9
> 2 112 lbs
> Honda 9.9 280 58x53 9 1/2x8 5/8
> 2.1 93 lbs
> Evinrude 9.9 HT 305 64x46 ?
> 2.42 99 lbs
>
> The relatively large differences in displacement (and weight) between
> the Mercury and Yamaha seem odd if the are the same. Tim, are the folks
> down there using the "high thrust" Yamahas? This would appear to be the
> route to the bigger propeller but then that raises another question
> about use on Tennessee: The Yamaha HT model is only availabe in long
> shaft (or extra-long) not the 15" short shaft model which corresponds
> to my measurement of the transom on Tennessee. Mercury (a.k.a. Yamaha?)
> offers their high thrust model ("Big Foot") in all three shaft lengths
> (as does Evinrude).
>
> My experience in trying to fathom out the choices by talking to the
> various dealers has been less than satisfying. So far I have yet to
> meet a dealer who knows as much as what can be found in the spec tables
> of the literature they distribute. Asking them to go beyond the data to
> an interpretation of what it all means for a particular vessel so far
> appears to be hopeless.
>
> Any engineers out there?
>
>
> ------------------------------------------------------------------------
> -- Check out your group's private Chat room
> --http://www.egroups.com/ChatPage?listName=bolger&m=1
>
>
For one discussion of motors, props, and more, see
http://www.geocities.com/Yosemite/Forest/2727/
and go to his "calculations" section. If it doesn't help you, at least
it reveals how complicated this subject can get.
Carter
"seth macinko" <macinko-@...> wrote:
original article:http://www.egroups.com/group/bolger/?start=1711
http://www.geocities.com/Yosemite/Forest/2727/
and go to his "calculations" section. If it doesn't help you, at least
it reveals how complicated this subject can get.
Carter
"seth macinko" <macinko-@...> wrote:
original article:http://www.egroups.com/group/bolger/?start=1711
> Just as I was shopping around for outboards for a Tennessee, alongfolks
> comes this thread! But I surely am confused (it doesn't take much).
> "Yamaha makes the Mecury 4 strokes" Really? I know there are all kinds
> of cross manufacturing arrangements but what puzzles me are the
> following specs (All drawn from each manufacturer's product lit or web
> sites except for the bore/stroke info on Yamaha which came from a
> competitors site--I haven't yet looked up data on Nissan--apologies to
> all for mixing imperial and metric units, displacement and bore/stroke
> are metric, propeller diameter and pitch are in inches, pounds are
> pounds):
>
> Make model displ borexstoke prop(diaxpitch) Gear ratio weight
> Yamaha 9.9 HT 232 59x40 ? 2.92 99 lbs
> Yamaha 9.9 232 59x40 ? 2.08 91 lbs
> Mercury 9.9 HT 323 59x59 10 3/8x9 1/2 2.42 128 lbs
> Mercury 9.9 323 59x42 9x9 2 112 lbs
> Honda 9.9 280 58x53 9 1/2x8 5/8 2.1 93 lbs
> Evinrude 9.9 HT 305 64x46 ? 2.42 99 lbs
>
> The relatively large differences in displacement (and weight) between
> the Mercury and Yamaha seem odd if the are the same. Tim, are the
> down there using the "high thrust" Yamahas? This would appear to bethe
> route to the bigger propeller but then that raises another questionYamaha?)
> about use on Tennessee: The Yamaha HT model is only availabe in long
> shaft (or extra-long) not the 15" short shaft model which corresponds
> to my measurement of the transom on Tennessee. Mercury (a.k.a.
> offers their high thrust model ("Big Foot") in all three shaft lengthstables
> (as does Evinrude).
>
> My experience in trying to fathom out the choices by talking to the
> various dealers has been less than satisfying. So far I have yet to
> meet a dealer who knows as much as what can be found in the spec
> of the literature they distribute. Asking them to go beyond the datato
> an interpretation of what it all means for a particular vessel so far
> appears to be hopeless.
>
> Any engineers out there?
>
Just as I was shopping around for outboards for a Tennessee, along
comes this thread! But I surely am confused (it doesn't take much).
"Yamaha makes the Mecury 4 strokes" Really? I know there are all kinds
of cross manufacturing arrangements but what puzzles me are the
following specs (All drawn from each manufacturer's product lit or web
sites except for the bore/stroke info on Yamaha which came from a
competitors site--I haven't yet looked up data on Nissan--apologies to
all for mixing imperial and metric units, displacement and bore/stroke
are metric, propeller diameter and pitch are in inches, pounds are
pounds):
Make model displ borexstoke prop(diaxpitch) Gear ratio weight
Yamaha 9.9 HT 232 59x40 ? 2.92 99 lbs
Yamaha 9.9 232 59x40 ? 2.08 91 lbs
Mercury 9.9 HT 323 59x59 10 3/8x9 1/2 2.42 128 lbs
Mercury 9.9 323 59x42 9x9 2 112 lbs
Honda 9.9 280 58x53 9 1/2x8 5/8 2.1 93 lbs
Evinrude 9.9 HT 305 64x46 ? 2.42 99 lbs
The relatively large differences in displacement (and weight) between
the Mercury and Yamaha seem odd if the are the same. Tim, are the folks
down there using the "high thrust" Yamahas? This would appear to be the
route to the bigger propeller but then that raises another question
about use on Tennessee: The Yamaha HT model is only availabe in long
shaft (or extra-long) not the 15" short shaft model which corresponds
to my measurement of the transom on Tennessee. Mercury (a.k.a. Yamaha?)
offers their high thrust model ("Big Foot") in all three shaft lengths
(as does Evinrude).
My experience in trying to fathom out the choices by talking to the
various dealers has been less than satisfying. So far I have yet to
meet a dealer who knows as much as what can be found in the spec tables
of the literature they distribute. Asking them to go beyond the data to
an interpretation of what it all means for a particular vessel so far
appears to be hopeless.
Any engineers out there?
comes this thread! But I surely am confused (it doesn't take much).
"Yamaha makes the Mecury 4 strokes" Really? I know there are all kinds
of cross manufacturing arrangements but what puzzles me are the
following specs (All drawn from each manufacturer's product lit or web
sites except for the bore/stroke info on Yamaha which came from a
competitors site--I haven't yet looked up data on Nissan--apologies to
all for mixing imperial and metric units, displacement and bore/stroke
are metric, propeller diameter and pitch are in inches, pounds are
pounds):
Make model displ borexstoke prop(diaxpitch) Gear ratio weight
Yamaha 9.9 HT 232 59x40 ? 2.92 99 lbs
Yamaha 9.9 232 59x40 ? 2.08 91 lbs
Mercury 9.9 HT 323 59x59 10 3/8x9 1/2 2.42 128 lbs
Mercury 9.9 323 59x42 9x9 2 112 lbs
Honda 9.9 280 58x53 9 1/2x8 5/8 2.1 93 lbs
Evinrude 9.9 HT 305 64x46 ? 2.42 99 lbs
The relatively large differences in displacement (and weight) between
the Mercury and Yamaha seem odd if the are the same. Tim, are the folks
down there using the "high thrust" Yamahas? This would appear to be the
route to the bigger propeller but then that raises another question
about use on Tennessee: The Yamaha HT model is only availabe in long
shaft (or extra-long) not the 15" short shaft model which corresponds
to my measurement of the transom on Tennessee. Mercury (a.k.a. Yamaha?)
offers their high thrust model ("Big Foot") in all three shaft lengths
(as does Evinrude).
My experience in trying to fathom out the choices by talking to the
various dealers has been less than satisfying. So far I have yet to
meet a dealer who knows as much as what can be found in the spec tables
of the literature they distribute. Asking them to go beyond the data to
an interpretation of what it all means for a particular vessel so far
appears to be hopeless.
Any engineers out there?