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Boat speed ??
rbritdu	#1  Posted on 07/29/07 - 7:14 PM
Member Posts: 81 Comments: 3 Joined: 10/21/05	I have a 1979 v 22 outrage.And a 200 v6 Mariner. Iam wondering how many knots I should be getting on this boat ?? On Gps I am only seeing 27 knots all trimmed !! I was hoping i would see a bit more speed. Also I have a Tach that only goes up to 6000 is that a problem ? Thanks Bob
duf	#2  Posted on 07/30/07 - 2:37 AM
Member Personal Page Photo Albums Posts: 840 Comments: 9 Joined: 04/22/07	I'm probably not the guy to be giving advice on outboards, but even to me that seems pretty slow. On the 6000 RPM's i'm-a-guessing thats more then enough, and i wouldn't advise going over it if for some reason you have some serious prop issues, like a prop thats way to small for the boat, which could contribute to the slower speed your seeing. My 22 outrage is knocking on the low 50's, but thats with a 225 E-tic. Duf
Derwd24	#3  Posted on 07/30/07 - 7:07 AM
Member Posts: 1607 Comments: 9 Joined: 05/09/07	What's the pitch on both your props? I have a 22' Outrage with an '87 225 HP I took out for the first time and was a little disappointed with accel and overall speed, and boy was it thirsty! It's got a 21 pitch and never really made it over 5100 RPM. Thinking of dropping the pitch to improve the low end performance... Edited by Derwd24 on 07/30/07 - 7:08 AM
joninnj	#4  Posted on 07/30/07 - 3:46 PM
Member Personal Page Posts: 408 Comments: 3 Joined: 06/07/07	Bob, Sounds like you can go up in pitch. What are you using now? My V6 merc was to operate at 5300 to 5800 RPM. 27 knots is abut 33-34 MPH, if your Mariner was also a 79 it was not prop shaft rated, more like a 175... You should not go beyond 6000 rpm... but you should see at least 40+ mph... What prop are you using? Duf, what prop did you wind up with, diameter and pitch? You also have your engine mounted a hole or two up right? This will make a big difference with the right prop. Drew, You are right you should be fairly close to Duf. Those old OMC's had tons of power, but were very thirsty A good Stainless will allow both of you run closer to the surface and raise your engine for bit more top end. Maybe you can raise then a hole or two, I know it is always not that easy... I want to this with my 17ft but will need to drill new holes... I may get a jack plate to use the exiting holes. Edited by joninnj on 07/30/07 - 3:53 PM Jon in NJ Many other boats and outboards in my boating history The Whaler is the one I like the best!!!
rbritdu	#5  Posted on 07/30/07 - 4:08 PM
Member Posts: 81 Comments: 3 Joined: 10/21/05	Jon, I will check the prop tomarow.Its stainless but i dont remeber the size.My step sister used to live in Greenwood lake . In a log cabin .You lived there long ?I would be happy with something near 40 mph . Thanks Bob
Joe Kriz	#6  Posted on 07/30/07 - 4:12 PM
Site Owner Personal Page Personal Album Photo Albums Project Albums Posts: 11447 Comments: 452 Joined: 03/18/05	You might also want to check your engine height. What hole are the bolts mounted in at the top of the engine? If you are throwing a rooster tail off of your engine (cavitation plate) then your engine is mounted too low.
Tom W Clark	#7  Posted on 07/30/07 - 6:47 PM
Member Personal Page Posts: 4280 Comments: 7 Joined: 09/30/05	Bob, Your Mariner 200 has a 5800 RPM redline so the tach is just fine. 27 knots is only 31 MPH and that boat should be capabe of at least another 10 MPH. Something is very wrong and I doubt it is the prop, but check it out and let us know. Edited by Tom W Clark on 07/30/07 - 6:50 PM
Tom W Clark	#8  Posted on 07/30/07 - 6:49 PM
Member Personal Page Posts: 4280 Comments: 7 Joined: 09/30/05	Derwd24, You should be using a 15-1/4" x 19" Mirage Plus or a 14-5/8" x 19" Revolution 4 or maybe even a 14-3/8" x 21" Enertia. A 14" x 21" Offshore would be a good prop for grip as well.
Derwd24	#9  Posted on 07/30/07 - 9:44 PM
Member Posts: 1607 Comments: 9 Joined: 05/09/07	Thanks Tom. How does the diameter of the prop affect performance? Is there a general rule of thumb?
Tom W Clark	#10  Posted on 07/30/07 - 9:58 PM
Member Personal Page Posts: 4280 Comments: 7 Joined: 09/30/05	There is NOT a "general rule of thumb." Each propeller model will behave differently. It is always best to inquire about specific propeller models and avoid reducing propeller design to simplistic terms like pitch and diameter, although those parameters certainly come into play. Edited by Tom W Clark on 07/30/07 - 9:59 PM
rbritdu	#11  Posted on 07/31/07 - 5:27 AM
Member Posts: 81 Comments: 3 Joined: 10/21/05	Tom, Does having a Ttop slow it down that much ? I also had fifty gallions of gas in the tank . I need my speed !!!! Thanks Bob
Tom W Clark	#12  Posted on 07/31/07 - 8:43 AM
Member Personal Page Posts: 4280 Comments: 7 Joined: 09/30/05	A T-top will slow a boat down, but not *that* much. You should make sure your motor is not missing a cylinder (or two.) Have you checked the compression recently?
Tom W Clark	#13  Posted on 07/31/07 - 8:49 AM
Member Personal Page Posts: 4280 Comments: 7 Joined: 09/30/05	rbritdu, As a point of reference, Whaler has published speed data for the Outrage V-22 that shows it capable of 50 MPH with a 200 HP motor. This is way back in 1980 before outboards were rated at the prop shaft. I personally know of several classic Outrage 22 with 225s that will go well in excess of 50 MPH. Again, I have to point out that if you are only able to get 31 MPH out of your boat, something is seriously wrong with it.
Derwd24	#14  Posted on 07/31/07 - 9:27 AM
Member Posts: 1607 Comments: 9 Joined: 05/09/07	What about a "heavy" hull with some water in it, when would you start to notice a decrease in performance due to extra weight?
Tom W Clark	#15  Posted on 07/31/07 - 10:14 AM
Member Personal Page Posts: 4280 Comments: 7 Joined: 09/30/05	Weight will begin to affect boat speed immediately, but enough weight to cause a 40 percent reduction in potential boat speed would be VERY obvious when the boat is just floating at rest.
rbritdu	#16  Posted on 07/31/07 - 1:47 PM
Member Posts: 81 Comments: 3 Joined: 10/21/05	The V22 sits in the water very nicely. Iam sure there maybe some water in the hull as many boats this age do have some . I will be doing a compression check this evening and I will check the prop size and see where the engine is set at as far as on transom and what holes are being used. I think when I had the engine WOT the tach was around 4k ? But the engine sounded good ? We shall see ... I will report back . Bob
rbritdu	#17  Posted on 07/31/07 - 6:32 PM
Member Posts: 81 Comments: 3 Joined: 10/21/05	Ok, The compression was 130 x5,135x1 and spark on all plugs . The plugs where covered with oil all but one was dry. The prop is a stainless Quicksilver 19p - A5#73980 and model? #85539.The engine is mounted on the fourth hole down out of five mount positions. So now any ideas ??? Thanks Bob
Joe Kriz	#18  Posted on 07/31/07 - 7:05 PM
Site Owner Personal Page Personal Album Photo Albums Project Albums Posts: 11447 Comments: 452 Joined: 03/18/05	Bob, Take a look at this thread and see where this engine is mounted. http://www.whalercentral.com/forum/vi...#post_9176 It is mounted in the 3rd set of holes. Some people call it the 2nd set of holes up as the top 1st hole the engine would be mounted all of the way down. The last hole would of course be all the way up... Some engines have 5 holes and others have 4 holes. Just for reference....
Tom W Clark	#19  Posted on 08/04/07 - 10:32 AM
Member Personal Page Posts: 4280 Comments: 7 Joined: 09/30/05	Bob, You motor is mounted "one hole up", as we say. That is a normal mounting position. Likewise a Quicksilver 73980A5 is a perfectly normal (if a bit dated) 14" x 19" cupped three blade stainless steel propeller. The #85539 does not comport with any prop number I know of. Was this stamped into the hub of the prop? If so, it indicates the prop has been worked on. This is not necessarily bad, but it may have been altered from its original blade shape and pitch. Compression sounds normal but the dry plug does not. You say you confirmed spark on all cylinders? How clean is the bottom of this boat? Is it trailered or moored?
rbritdu	#20  Posted on 08/04/07 - 7:31 PM
Member Posts: 81 Comments: 3 Joined: 10/21/05	Yes there was spark on all six plugs . The boat is trailered at this time but is rough with some bottom paint that is years old . 80% covered maybe . It doesnt look like the bottom was sanded when painted . So Iam wondering if I should paint or not ?? Anyhow thats another story . Would the rough bottom have a large effect on the speed ??Should I spend the money on a new prop ?What should I do about the one dry plug ?Thanks Bob