Auxiliary outboard size
 

Hi All,

I'm looking for a bit of advice, I've just bought a 1996 Maxum 2000 SCL (20
ft). The main engine is a 190HP mercruiser but the boat is fitted with a
transom for an auxiliary outboard.

Can anyone recommend a suitable size of engine for this?

Thanks

Auxiliary outboard size
 

Hi,

Thanks for the reply.

Mainly as an emergency engine in case the main packs up.

I plan on using the boat on lakes and rivers.

Colin

Auxiliary outboard size
 

Auxiliary outboard size
 

On Tue, 23 Jan 2007 23:22:03 GMT, Short Wave Sportfishing
wrote:

Runabout, not light certainly, but not overly heavy either - I'd say
something in the 10 to 15 hp range would be good, four stroke so you
don't have to screw around with oil mixing and can feed off the main
fuel line, electric start as starting this type of outboard can be
problematic depending on how it's mounted (not enough room to pull the
start rope).

Probably a Yamaha would be a decent choice for manufacturer - Honda if
price isn't a problem.

All good recommendations in my experience.

Auxiliary outboard size
 

"Dan" wrote in message
...
wrote:
Hi All,

I'm looking for a bit of advice, I've just bought a 1996 Maxum 2000 SCL
(20
ft). The main engine is a 190HP mercruiser but the boat is fitted with a
transom for an auxiliary outboard.

Can anyone recommend a suitable size of engine for this?

Thanks

I'd skip the kicker as long as you can always reach someone with your VHF
or cell phone - it will detract from the looks and just get in the way.
There's also a very good chance it won't start if you have it hanging
there for a while until your main motor gives out. Also, others have
suggested a four stroke so you can use the same fuel tank. If your
problem is because of the fuel, it also won't work.

If you're still determined to get one, go for a 15hp so you can get
upstream at a reasonable rate of speed. The price difference from a 9.9
is negligible.

Dan

An 8 HP high thrust will drive that boat as fast as any 15-25 hp motor. It
is going to run about 5-6 mph hull speed. I run a Yamaha T-8 on my 21'
3400# boat and I get about 6.5mph and with the old 15 hp Mariner 2 stroke
got about 5 mph. The high thrust / big foot motors are designed for
displacement running.

Auxiliary outboard size
 

Calif Bill wrote:

"Dan" wrote in message
...

wrote:

Hi All,

I'm looking for a bit of advice, I've just bought a 1996 Maxum 2000 SCL
(20
ft). The main engine is a 190HP mercruiser but the boat is fitted with a
transom for an auxiliary outboard.

Can anyone recommend a suitable size of engine for this?

Thanks

I'd skip the kicker as long as you can always reach someone with your VHF
or cell phone - it will detract from the looks and just get in the way.
There's also a very good chance it won't start if you have it hanging
there for a while until your main motor gives out. Also, others have
suggested a four stroke so you can use the same fuel tank. If your
problem is because of the fuel, it also won't work.

If you're still determined to get one, go for a 15hp so you can get
upstream at a reasonable rate of speed. The price difference from a 9.9
is negligible.

Dan


An 8 HP high thrust will drive that boat as fast as any 15-25 hp motor. It
is going to run about 5-6 mph hull speed. I run a Yamaha T-8 on my 21'
3400# boat and I get about 6.5mph and with the old 15 hp Mariner 2 stroke
got about 5 mph. The high thrust / big foot motors are designed for
displacement running.



That would be an intersting test. You're right about the high thrust
gearcases but there are also a variety of props available for the bigger
OB's to give them more low-end bite. I'm suprised at your results from
those two motors on the same boat.

Auxiliary outboard size
 

"Dan" wrote in message
...
Calif Bill wrote:

"Dan" wrote in message
...

wrote:

Hi All,

I'm looking for a bit of advice, I've just bought a 1996 Maxum 2000 SCL
(20
ft). The main engine is a 190HP mercruiser but the boat is fitted with
a
transom for an auxiliary outboard.

Can anyone recommend a suitable size of engine for this?

Thanks

I'd skip the kicker as long as you can always reach someone with your VHF
or cell phone - it will detract from the looks and just get in the way.
There's also a very good chance it won't start if you have it hanging
there for a while until your main motor gives out. Also, others have
suggested a four stroke so you can use the same fuel tank. If your
problem is because of the fuel, it also won't work.

If you're still determined to get one, go for a 15hp so you can get
upstream at a reasonable rate of speed. The price difference from a 9.9
is negligible.

Dan


An 8 HP high thrust will drive that boat as fast as any 15-25 hp motor.
It is going to run about 5-6 mph hull speed. I run a Yamaha T-8 on my
21' 3400# boat and I get about 6.5mph and with the old 15 hp Mariner 2
stroke got about 5 mph. The high thrust / big foot motors are designed
for displacement running.

That would be an intersting test. You're right about the high thrust
gearcases but there are also a variety of props available for the bigger
OB's to give them more low-end bite. I'm suprised at your results from
those two motors on the same boat.

the 2 stroke would drive my 14' aluminum boat about 22. I think the prop
would blow out and just make lots of bubbles when tried to run at high speed
as the kicker.

Auxiliary outboard size
 

Short Wave Sportfishing wrote:

Probably a Yamaha would be a decent choice for manufacturer - Honda if
price isn't a problem.

I've had both and prefer the Yamaha T8 to the Honda 15 in
that application. They'll both just start to climb the bow
wave but the Yamaha behaves better.

-rick-

Auxiliary outboard size
 

Colin wrote:
1996 Maxum 2000 SCL (20
ft). The main engine is a 190HP mercruiser but the boat is fitted with a
transom for an auxiliary outboard.
Can anyone recommend a suitable size of engine for this?

"Dan" wrote:
go for a 15hp so you can get
upstream at a reasonable rate of speed. The price difference from a 9.9
is negligible.

"Calif Bill" wrote:
An 8 HP high thrust will drive that boat as fast as any 15-25 hp motor.

I'd think in terms of "thrust" (large dia prop, low gear ratio), as
well. Extra horsepower without the high thrust won't be of any help in
this application.

Rick