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 |
Colin
Jan 23
|
| 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 |
PhantMan
Jan 24
|
| 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. |
Dan
Jan 23
|
| 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. |
Calif
Jan 24
|
| 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- |
-rick-
Jan 23
|
| An auxiliary for what purpose? Slow trolling for fishing? An 8-10 hp
four cycle. |
Harry
Jan 23
|
| 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 |
Colin
Jan 23
|
| Well, unless you have really fast current in that river, a 10 hp four
cycle will get you back home safely. Your boat isn't that heavy. Get a
long control handle on the outboard; no need to pay for remote controls.
An autotilt would be handy. I see heavier boats than yours in Chesapeake
Bay with 8-10 hp outboards moving at a decent non-planing clip. |
Harry
Jan 23
|
| 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. |
Short
Jan 23
|
| 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 |
Dan
Jan 23
|
| All good recommendations in my experience. |
Wayne.B
Jan 23
|
| 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. |
Calif
Jan 24
|
