Reply
 
LinkBack Thread Tools Search this Thread Display Modes
  #1   Report Post  
posted to rec.boats
external usenet poster
 
First recorded activity by BoatBanter: Jan 2007
Posts: 3
Default 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
  #2   Report Post  
posted to rec.boats
external usenet poster
 
First recorded activity by BoatBanter: Jan 2007
Posts: 3
Default 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
  #4   Report Post  
posted to rec.boats
external usenet poster
 
First recorded activity by BoatBanter: Jul 2006
Posts: 10,492
Default 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.

  #6   Report Post  
posted to rec.boats
Dan Dan is offline
external usenet poster
 
First recorded activity by BoatBanter: Sep 2006
Posts: 506
Default 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.
  #7   Report Post  
posted to rec.boats
external usenet poster
 
First recorded activity by BoatBanter: Jul 2006
Posts: 4,727
Default 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.


  #8   Report Post  
posted to rec.boats
external usenet poster
 
First recorded activity by BoatBanter: Jul 2006
Posts: 177
Default 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-
  #9   Report Post  
posted to rec.boats
external usenet poster
 
First recorded activity by BoatBanter: Jul 2006
Posts: 478
Default 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
Reply
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules

Smilies are On
[IMG] code is Off
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
How to Position an Auxiliary Motor on the Transom of a 18-ft Power Boat? [email protected] Cruising 4 June 6th 06 09:03 AM
The Right Size Outboard Gas Engine for a 18-ft Boat? [email protected] General 14 September 18th 05 09:45 PM
100th Anniversary of Outboard Don White General 6 July 16th 05 03:28 AM
The Outboard Motor Drive System winder General 0 December 28th 04 11:05 AM
optimal outboard motor size for hardshell dinghy to rescue grounded sailboat ? Geoff Schultz Cruising 8 December 21st 04 09:44 AM


All times are GMT +1. The time now is 08:36 PM.

Powered by vBulletin® Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.
Copyright ©2004-2025 BoatBanter.com.
The comments are property of their posters.
 

About Us

"It's about Boats"

 

Copyright © 2017