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NEW motor spraying water in boat
Tig	#21  Posted on 08/29/10 - 5:52 AM
Member Personal Page Posts: 122 Comments: 0 Joined: 02/24/09	Any chance you can get a decent picture of the spray as it comes off the motor? It may give some clues as to what the best course of action would be. My Honda also sprays more than I am accustom to seeing. I read somewhere that the new Honda model has a larger splash plate. In my motor it may be a bit of a design issue. 1995 Dauntless 15, Honda 50
Kevinhunter11	#22  Posted on 08/29/10 - 6:12 AM
Member Posts: 11 Comments: 0 Joined: 05/05/10	Yes, I will take some shots later today and post them. Kevin 1984 Outrage 18, 150 Mercury EFI Saltwater
Tom W Clark	#23  Posted on 08/29/10 - 8:46 AM
Member Personal Page Posts: 4280 Comments: 7 Joined: 09/30/05	Kevin -- The cavitation plate is not 2 inches above the bottom of the keel if the 25" (XL) motor is mounted all the way down on the transom of your Outrage 18. Are you sure you are not looking at the spray shield instead of the AV plate? The spray is the obvious clue that the motor is way too low on the transom. If it is all the way down on the transom, then it needs to come up two holes and all your problems will be solved. If you are using a "whale tail" foil, remove it form the motor as it will only aggravate any problems you are having now.
Kevinhunter11	#24  Posted on 08/29/10 - 5:10 PM
Member Posts: 11 Comments: 0 Joined: 05/05/10	Here is a link to a few shots i took about an hour ago, Its kind of difficult to see the spray / fantail. It is not in the wake but close to the boat. I do not have a whale tail. And yes the anti-cav plate is at least 2" higher than the keel. i'll take a shot of that later this week if i pull it out. I appreciate all of your help. Here is the photo link: http://picasaweb.google.com/115933246...tTV2tmwSg# Kevin 1984 Outrage 18, 150 Mercury EFI Saltwater
Joe Kriz	#25  Posted on 08/29/10 - 5:15 PM
Site Owner Personal Page Personal Album Photo Albums Project Albums Posts: 11447 Comments: 452 Joined: 03/18/05	What size prop did you end up getting? What RPM's are you getting now at Wide Open Throttle? A long Shaft motor is 20 inches = L An Extra Long Shaft is 25 inches = X An Extra Extra Long Shaft is 30 inches = XX Edited by Joe Kriz on 09/02/10 - 5:04 PM
CES	#26  Posted on 08/29/10 - 5:25 PM
Member Personal Page Photo Albums Project Albums Posts: 2681 Comments: 7 Joined: 04/27/07	From the looks of the center picture, it "appears" that the cavitaion plate is under water while on a plane. Ideally, you should see your cavitation plate should be clearly visible. The first picture shows the tell tale signs of a motor that is sitting to low in the water. Without actually seeing a video or more detailed pictures, it's very difficulty to tell. Edited by CES on 08/29/10 - 5:25 PM Cliff 1966 13' Sport with a 1993 40hp Yamaha 2 Smoker
Kevinhunter11	#27  Posted on 08/29/10 - 5:35 PM
Member Posts: 11 Comments: 0 Joined: 05/05/10	I have a Vortex 15 x 17 on now I haven't vet had the kahuunas since the engine is new (5 hrs now) to WOT, but I had her pretty close to WOT and was over 5K Rides WAY bow high and is pretty vertical when jumping up on plane. Falls off plane at about 2900 If I tilt out the fan tail, she starts porpoising ENGINE Serial number reflects XL Kevin 1984 Outrage 18, 150 Mercury EFI Saltwater
Josey Whaler	#28  Posted on 08/29/10 - 6:00 PM
Member Posts: 77 Comments: 1 Joined: 05/28/08	I don't see how any inference regarding the position of the cavitation plate can be drawn for any of the photos. You can easily measure the relation of the cavitation plate while the boat is on the trailer. All you need is a 2 or 3' piece if straight wood. I don't know the ride characteristics of a Vortex propeller (stern or bow lift) but you may try a propeller known for its stern-lifting characteristics. 2,900 RPM seems awful high for the boat to fall off plane. I would think you could maintain plane down to 2,000 or even less.
JohnnyCW	#29  Posted on 08/29/10 - 6:28 PM
Member Posts: 684 Comments: 0 Joined: 08/16/09	Josey Whaler wrote:2,900 RPM seems awful high for the boat to fall off plane. I would think you could maintain plane down to 2,000 or even less. 2,000 rpm or even less with a 150 on a 18' Outrage?, seriously?
number9	#30  Posted on 08/29/10 - 7:47 PM
Member Posts: 210 Comments: 1 Joined: 03/13/08	Kevin, Looking at the photos you provided the motor appears to me(?) to be "trimmed" out/up too far. Is it possible the dealer installed a tilt pin or or failed to remove the shipping bolt preventing the motor from trimming in/down enough? From the operation manual: "In rare circumstances, the owner may decide to limit the trim in. This can be accomplished by purchasing a stainless steel tilt pin (Part Number 17-49930A1) from your dealer and inserting it in whatever adjustment hole in the transom brackets is desired. The non-stainless steel shipping bolt should not be used in this application other than on a temporary basis." Also looked at the Mercury EMEA download area and the tech. drawing indicates the XL shaft measures 25.25". The mounting height is close to correct(old school) and shouldn't be causing your strange performance issues. The prop shouldn't be either. Once you find the root cause and fix their rigging errors you'll be able make further height adjustments if desired. Bill...On the Ogeechee 1984 Outrage 18...Yamaha T50...that's right, 50hp
Tom W Clark	#31  Posted on 08/29/10 - 9:20 PM
Member Personal Page Posts: 4280 Comments: 7 Joined: 09/30/05	...yes the anti-cav plate is at least 2" higher than the keel. No, it is not. I think we there may be some confusion as to what the AV plate is and how to measure its height. I owned an Outrage 18 for over 10 years and it had a 25" shaft kenbgth (XL) 150 on it. I know what I am talking about. There is no way on Earth that a 25" shaft length outboard mounted all the way down on the transom of an Outrage 18 can have its AV plate anything but below the keel. Rides WAY bow high and is pretty vertical when jumping up on plane. Falls off plane at about 2900 If I tilt out the fan tail, she starts porpoising Yes, those things are all perfectly consistent with an outboard that is mounted way too low on the transom. The photos of the spray confirm this. It was pointed out at the beginning of this thread that the motor is too low, I said it above and now I am repeating this advice: raise the motor at least two bolt holes (1-1/2").
Kevinhunter11	#32  Posted on 09/12/10 - 9:02 AM
Member Posts: 11 Comments: 0 Joined: 05/05/10	OK, I pulled the boat and here are some pictures of the location of the engine on the boat. Let me know what you think. http://picasaweb.google.com/115933246...H3tIiSvAE# Thanks! Kevin Kevin 1984 Outrage 18, 150 Mercury EFI Saltwater
Tom W Clark	#33  Posted on 09/12/10 - 9:35 AM
Member Personal Page Posts: 4280 Comments: 7 Joined: 09/30/05	Kevin -- Ah, just as I thought, your cavitation plate is well BELOW the keel. I think you are looking at the spray shield and thinking that is the cavitation (AV) plate. I again recommend you raise your motor two bolt holes and the spray will be gone, you boat will go faster, handle better and get better fuel mileage. The installing dealer who insisted the motor needs to be mounted all the way down on the transom is an idiot, but he is in good company with a lot of other older outboard mechanics/dealers who do not know how to properly rig an outboard or prop it.
Kevinhunter11	#34  Posted on 09/12/10 - 10:23 AM
Member Posts: 11 Comments: 0 Joined: 05/05/10	AWESOME! Thanks for the info!! Appreciate all your assistance Kevin 1984 Outrage 18, 150 Mercury EFI Saltwater
Derwd24	#35  Posted on 09/12/10 - 10:33 AM
Member Posts: 1607 Comments: 9 Joined: 05/09/07	Tom W Clark wrote: The installing dealer who insisted the motor needs to be mounted all the way down on the transom is an idiot, but he is in good company with a lot of other older outboard mechanics/dealers who do not know how to properly rig an outboard or prop it. Unfortunately I don't think this is just limited to older mechanics and dealers... Dave - 1983 Outrage 22
Tom W Clark	#36  Posted on 09/12/10 - 12:46 PM
Member Personal Page Posts: 4280 Comments: 7 Joined: 09/30/05	Kevin -- I should add that if you are going to stick with that feeble aluminum prop, you may be better raising it only one hole, but to get the full benefit of your new Mercury 150, you need to install a good stainless steel propeller on it and raise it two holes. I recommend a Laser II, Advantage or Turbo 1.
CES	#37  Posted on 09/12/10 - 5:42 PM
Member Personal Page Photo Albums Project Albums Posts: 2681 Comments: 7 Joined: 04/27/07	Kevin. I think you were confused as to what exactly a cavitation plate is. The photos clearly show it is way too low. Take toms advise, he's spot on. Cliff 1966 13' Sport with a 1993 40hp Yamaha 2 Smoker