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Author Topic:   220 Dauntless performance
Milepost43 posted 05-21-2004 06:40 PM ET (US)   Profile for Milepost43   Send Email to Milepost43  
Finished breakin on my new 220 with Merc 225. This boat is my first with a jack plate. Really glad I have it. Following is my RPM/MPH results vs BW numbers. My #s generally had the motor jacked up.
RPM BW Mine(gps)
Off plane @ 2700 rpm
2750 10.2 20.2
3000 13.6 23.5
3250 18.3 26.8
3500 25.2 28.1
4000 32.0 32.8
4500 36.1 37.0
5000 40.8 41.0
5500 45.7 44.6(max of 5480)
5750 47.5 xxxx (merc max)

Thinking prop is not quite right for top end but it will snap your head when rpm hits about 2500-3000 from dead stop.

Any comments/thoughts welcomed. What a great boat.

danlowry posted 05-24-2004 02:40 PM ET (US)     Profile for danlowry  Send Email to danlowry     
How does the Dauntless 22 ride in 1 - 2 foot chop? I'm thinking of downsizing from my 26 Outrage to a Dauntless 22 (I love the look of the 22). My only concern is the relatively shallow V on the Duantless versus the Outrage.
jcswpa posted 05-26-2004 03:02 PM ET (US)     Profile for jcswpa  Send Email to jcswpa     
Help my education on my 22 dauntless here - what is a Jack Plate?
bsmotril posted 05-28-2004 11:06 AM ET (US)     Profile for bsmotril  Send Email to bsmotril     
A Jack plate is a metal bracket that mounts between the motor and the transom. It accomplishes two things:
1) Sets the motor back from the transom an amount equal to the thickness of the bracket

2) Allows the motor to be raised or lowered in a vertical plane (jacked)independently from the trim which changes the axis of thrust with respect to the boats attitude.

Jackplates can "jack" either via manually adjusted screws, or electro-hydraullicaly while underway.

The benefit is that you can optimize the engine position for speed, (Higher=less submerged gear case=less drag = faster)or for running across shallow flats. The engine setback the bracket provides also lets the motor be mounted higher because thw water coming out of the bottom of the transom curves up after passing under the boat. Jackplates are very common on shallow water fishing boats used along the gulf coast where there is plenty of water to cross in the 6" to 18" range.


duckear posted 05-28-2004 11:35 AM ET (US)     Profile for duckear  Send Email to duckear     
who made your jackplate?

Milepost43 posted 05-28-2004 09:10 PM ET (US)     Profile for Milepost43  Send Email to Milepost43     
My jack plate was made by CMC(PL-65 Electric Hydraulic Transom Jacks and has a 5.5" setback.

I have had some emails with PowerTech!Propellers about a prop change and this is their answer:
1. Currently your prop is running at 90% efficiency, only 10% propeller slip and going 45mph. Any prop running at 90% efficiency or better is great. Even if we improve your efficiency by 5% (95%) your speed will only increase 1 or 2 mph, so no you may not see 50mph.
2. However, if you want to improve hole shot, mid-range performance, slower planing speeds, and better gallons per cruising hour, I can recommend a 4-blade prop. You top end may suffer 1-2 mph but what is that compared better fuel economy at 2.25 per gallon.

Plan to discuss the 4 blade prop although I have a great hole shot now would like to explore slower planing speeds although the jack plate makes a BIG diff from BW performance.

Haven't had the boat in any rough water yet but live near ATL so will be in a large lake not the Gulf/Atlantic. I do have the Lenco trim tabs which should help quite a bit.

I do wonder how the 220 will do in bigger waves, say 3-4's with the wide flared bow above the deep V. Anybody have experience?

I have the new MK 74 Riptide 60" shaft trolling motor with Auto/Co Pilot. Being able to walk around and help my grandson fish while controlling the tmotor with the "puck" strapped to my wrist is sure nice.

Overall, couldn't be happier with the 220 and 225 Optimax.

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