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  DAUNTLESS 22 with 200-HP Optimax

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Author Topic:   DAUNTLESS 22 with 200-HP Optimax
jcswpa posted 08-14-2004 08:24 AM ET (US)   Profile for jcswpa   Send Email to jcswpa  
[The author has a DAUNTLESS 22 with a 200-HP Optimax engine and reaches 38-MPH at Wide Open Throttle. He posted this article to the general forum. It has been moved to the PERFORMANCE forum.]

On a DAUNLTESS 22 with a 200-HP Optimax engine, with one person aboard, with bimini frame with receeded [stowed?] canvas, almost no chop, and no special gear, does 38-MPH [at wide open throttle?] sound about right? It was slightly over 5000 RPM and hit 37-knots (nautical miles per hour) on the GPS, or 38-MPH (statute miles per hour) on the paddlewheel. I thought I might be able to get it up to mid 40-MPH, but not to be. Any experiences?

bmclernon posted 08-14-2004 08:48 AM ET (US)     Profile for bmclernon  Send Email to bmclernon     
A speed of 37 kts is approx 42+ mph. You referenced kts on your GPS and mph on your paddlewheel. I'd go with the GPS.
lakeman posted 08-14-2004 04:56 PM ET (US)     Profile for lakeman  Send Email to lakeman     
I think it is slow for a 200 on a 22 foot boat.
Sal DiMercurio posted 08-14-2004 10:47 PM ET (US)     Profile for Sal DiMercurio  Send Email to Sal DiMercurio     
JC, for some reason my head tells me that engine needs to get very near 6000 rpms but you say your barely getting 5000.
First of all, if that engine is mounted all the way down on the transom, it has to be raised up at least 1 set of holes & possiblt 2 sets.
Look in your manual & get back to us & let us know what the maximum recommended rpms are for that engine.
You might also have the wrong prop on her.
Check the size of the prop & which holes the engine is mounted on & what the max rpms your now getting with a normal load on the boat & trimmed out .
Sal
Clark Roberts posted 08-16-2004 07:34 AM ET (US)     Profile for Clark Roberts  Send Email to Clark Roberts     
I agree with Sal... good advice and I think 5800rpm is recommended max (check it out). Also you can determine the max potential speed (assumes everything is correct.. clean hull, correct prop, max trim..etc...) by the formula given in reference section. It goes like this: Determine the gross weight of your boat (engine, fuel, persons, gear); Divide the horsepower by this gross weight figure; Take the square root of this value and multiply by hull constant of 180 for deep V or 200 for semi V and tri hull. This will give you a good estimate of the potential top speed. Happy Whalin'... Clark.. Spruce Creek Navy
Clark Roberts posted 08-16-2004 07:36 AM ET (US)     Profile for Clark Roberts  Send Email to Clark Roberts     
PS> results will be in statute miles per hour
Peter posted 08-16-2004 07:56 AM ET (US)     Profile for Peter  Send Email to Peter     
Alternatively, simply compare your performance to that reported for the 22 Dauntless/200 Optimax at Whaler.com. From their performance report, it looks to me that you should see 47 MPH with a 15 1/2 x 17P Mirage Plus propeller at 5750 RPM.
jeffs22outrage posted 08-16-2004 08:43 AM ET (US)     Profile for jeffs22outrage  Send Email to jeffs22outrage     
This past weekend I measured 42.6 mph at 5200rpm (wot) by gps on my 1985 22 outrage with 2 guys full tank of gas and a 235 OMC. Water had a "LIGHT CHOP"
jimh posted 08-16-2004 07:40 PM ET (US)     Profile for jimh  Send Email to jimh     
[Moved this article to the PERFORMANCE forum from the GENERAL forum.]
schollis posted 10-05-2004 11:03 AM ET (US)     Profile for schollis  Send Email to schollis     
I also have a '00 - 22' Dauntles with '01 200Hp Optimax.
I have almost the same exact performance. (My rpm's 5700).
Quite lake, 2 people, quite day, approx. 80 gals. fuel.

I am actually looking to sell this fall the Optimax (approx. 100 hrs.), to replace it withe either, 250 Yamaha, Suzuki, 225 Honda, or 225 Mercury 4-stroke, and cautiously would like constructive feedback.
Originally I thought Mercury would be the easiest, seemles solution, but the 10 or so dealers I contacted had no interest on trade or consignment.

Steve

Plotman posted 10-05-2004 11:55 AM ET (US)     Profile for Plotman  Send Email to Plotman     
Look at the performance data Whaler publishes for this boat/motor combination on their website http://www.whaler.com/Rec/pdfs/220DauntlessEng.pdf They also have prop data there. Make sure that your engine is mounted correctly (as in 1-2 holes up).

The last page is the one that I find most interesting - the 200 and 225 opti are almost identical with each other, and both should give top speed of 47 mph @ 5750 RPM.

LHG posted 10-05-2004 03:30 PM ET (US)     Profile for LHG    
Schollis - Your problem is probably the fact that it's a 2001 model engine. That was the year Mercury received a bunch of defective fuel rails (I think!) and other components from a vendor, causing a nightmare of problems for Mercury and Boston Whaler, with the #6 cylinder often going. The situation is long since fixed and the Optimax's are now bulletproof.

You should be sure that engine has received all of the necessary upgrades before attempting to sell it outright, which you should easily be able to do. Maybe someone here will buy it, with only 100 hours on it, and brought up to current specs, it should be a great re-power engine for someone. They are very strong 200's, even faster than the 200 EFI's

schollis posted 10-10-2004 09:34 AM ET (US)     Profile for schollis  Send Email to schollis     
The boat has plenty of power to plane, and great acceleration. Does anyone know what type of connector the engine has to read the computer data ?
Is it similar to a car (modern), that uses a OBD or OBDII connector ?
I thought it would be great to put a diag. memory chip.

http://www.davisnet.com/drive/products/drive_product.asp?pnum=8220

Steve

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