Moderated Discussion Areas
ContinuousWave: Whaler Performance
Kicker for Guardian 20
|Author||Topic: Kicker for Guardian 20|
posted 01-27-2004 11:27 AM ET (US)
Finding a buddy boat has sometimes delayed our offshore trips, so I'm adding a kicker for a bit more security. What horsepower and shaft length would be most efficient for a Guardian 20? Experianced Guardian or Outrage owners [are invited to comment].
posted 01-27-2004 03:35 PM ET (US)
We have a 20' aluminum all-welded hardtop boat in which we putt around Puget Sound and the west side of Vancouver Island. We've run both an 8-hp Honda and a 15-hp Evinrude for kickers, both 4-stroke. The extra 7 horsepower is good for all of maybe 0.5 mph (~5.5-6.5 mph tops for both).
On the Honda, I'm not aware of any available aftermarket low-pitch "sailboat" prop. We bought one for the Evinrude, and it's more responsive (particularly in reverse) than the factory evinrude prop or the honda.
The hot kicker ticket right now is the Yamaha and the Merc with the bigfoot lower unit--look for a funny-looking elephant eared prop with an unusually large hub. In reverse, exhaust turns 180 degrees in the hub and runs out the front of the prop, and therefore your blades bite clean water for good response backing into a slight current or wind while jigging.
We nearly get this bigfoot effect with the sailboat prop on the evinrude, but the real deal is more positive.
Shaft length: 20-inches should be right. Verify that anti=ventilation plate is about level (+/- 2") with hull at installation spot.
Power--I don't think that you can use more than 8-10 horsepower for a boat that size. I see many larger boats running the 9.9 Yamaha. I'd be eyeballing the 8-hp Yamaha with the big prop.
posted 01-27-2004 10:45 PM ET (US)
I have noticed a number of commercial fishing charter Boston Whaler boats using a Yamaha 4-stroke outboard. They also seem to have the addition of a propeller nozzle (a ring around the propeller) which I presume has been added to enhance the low speed thrust. You often see these propeller rings on much larger displacement boats in low-speed and high-thrust applications like tug boats or tow boats.
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