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bill and theresa View Drop Down
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    Posted: 06/15/2012 at 7:02pm
I have a 1995 20'suncruiser with a 50 johnson and my question is the motor too low. When I am running about wot The water comes up  and spray off both sides of the motor up to about the top cover bottom. I had a 24 footer with a 70 yamaha and it never came that high.



Edited by rickdb1 - 06/15/2012 at 7:59pm
1995 Suncruiser 20'
Johnson 50 HP
Lake Gaston, Va
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bill and theresa View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote bill and theresa Quote  Post ReplyReply Direct Link To This Post Posted: 06/15/2012 at 7:19pm
Thanks nightfisher for the fast response. That will be my job for tomorrow.Smile
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Guests Quote  Post ReplyReply Direct Link To This Post Posted: 06/15/2012 at 8:00pm
Agree with Nightfisher. Looks pretty low.
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bill and theresa View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote bill and theresa Quote  Post ReplyReply Direct Link To This Post Posted: 06/18/2012 at 12:47pm
well I moved it up 2 holes. steering cable stopped it. If that doesn't do it I will have to notch out where the cable comes thru a hole.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Ten42 Quote  Post ReplyReply Direct Link To This Post Posted: 06/18/2012 at 1:11pm
I had to do the same thing. I now have the hole that my steering cable comes through cut all of the way up to the floor. And the cable still is about a 1/4" higher than the hole. It is fine for use, I'll just have to drop the motor to remove the cable. I'm not sure what I'm going to do if I need to raise the motor any more. Hopefully your setting will work where you have it and you won't have to do any modifying!!
1992 Godfrey Sweetwater 24'
2004 Mercury 90 2-Stroke
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Ten42 Quote  Post ReplyReply Direct Link To This Post Posted: 06/18/2012 at 10:51pm
Well when I mounted the 90 on the boat I put it on as high as it could possibly go on my motor. The hole that the steering cable comes through won't allow it to go any higher. I already modified the hole all of the way up to the floor. I can't trim it any more. I'm just not sure how I'm going to get it any higher at this point. Has anyone else had this dillema before and possibly found a solution? Here are a couple pictures of the setup. Sorry about the quality but they're the best I could do right now.
 
1992 Godfrey Sweetwater 24'
2004 Mercury 90 2-Stroke
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Ten42 Quote  Post ReplyReply Direct Link To This Post Posted: 06/18/2012 at 10:56pm
Here is a little better picture. As you can see, the cavitation plate is around 4 inches below the transom.
 
1992 Godfrey Sweetwater 24'
2004 Mercury 90 2-Stroke
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Guests Quote  Post ReplyReply Direct Link To This Post Posted: 06/18/2012 at 11:34pm
can't see diddly on the last pic, its all dark with nothing to see Ouch In fact, its all too dark. Need daylight pics or a LOT more light to see clearly. 

Edited by Wildcat Dude - 06/18/2012 at 11:35pm
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Guests Quote  Post ReplyReply Direct Link To This Post Posted: 06/18/2012 at 11:39pm
You need to keep all your posts together regarding the motor, as you're all over the place making it REALLY HARD for folks to keep track of your progress and giving you advice
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Ten42 Quote  Post ReplyReply Direct Link To This Post Posted: 06/19/2012 at 5:48pm
Here are some pictures from today. Maybe they'll help a little more.
1992 Godfrey Sweetwater 24'
2004 Mercury 90 2-Stroke
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Ten42 Quote  Post ReplyReply Direct Link To This Post Posted: 06/19/2012 at 5:50pm
1992 Godfrey Sweetwater 24'
2004 Mercury 90 2-Stroke
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Post Options Post Options   Thanks (0) Thanks(0)   Quote p3cflyr Quote  Post ReplyReply Direct Link To This Post Posted: 06/19/2012 at 6:43pm
It does appear to be a little low.  However, it would be more discernible if there were more of the stern area to look at.  The first pic in this thread (Bill and Theresa's) is pretty good in that it shows all of those things so that one can see the relationship of them.  Some members believe that the relationship of the tubes to the transom and motor are as important as the single relationship of the vent plate to the transom.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Guests Quote  Post ReplyReply Direct Link To This Post Posted: 06/19/2012 at 7:38pm
I'm of the mindset in that it depends on how the boat sits and rides in the water. Sure, some of them you can look at and see it's obvious that the motor should be raised. But to me the real test is how it does on the water. Take two identical Pontoons with different layouts. One might have a lot of weight in the stern from Furniture, A Sunpad, Larger heavier motor, Etc. and would require that the motor be raised up. Another might have little furniture or just fishing seats in the rear, a Small HP light motor and might need to be deeper to avoid ventilation problems. So I don't think one setting fits all. They say on most boats that "plane out", you want to have the cavitation plate riding right at the top of the water when running wide open. I'm also not so sure that holds true on a toon either. Pontoons have such a disturbed water flow to the prop, that many times having the prop a little deeper can prevent blowout and actually provide better thrust. Another way to kind of figure it out is to look at the water line on the logs and see where the prop sits in relation to that line. 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Ten42 Quote  Post ReplyReply Direct Link To This Post Posted: 06/19/2012 at 7:53pm
Well Rick you answered a question before I even had a chance to ask it. I too have been told about the cav plate being just out of the water while at cruising speed. That that is what your ultimate goal is. Well as you stated, the water is quite disturbed as its passing by there and if you try trimming to that position you're bound to ventilate on a regular basis. The problem I am having is that I have always operated a regular pleasure boat and have never had over a 50 on a pontoon. So with the 50 I essentially just trimmed it all the way in and went with it. Well, now with this 90 I have discovered that I'm going to have to play with the trim some more to get the optimal performance out of it. I only had it out once and it is extremely over propped so I didn't push it too hard. The new prop is supposed to be here tomorrow so I will have to do some experimenting with it on there and see what happens. I'm also kind of hoping that the whale tail that is on there will help me be able to keep the trim a little higher with out blowing out. What do most of you do in regards to your trim at cruising speed? Any rules of thumb or is it strictly all by feel?
1992 Godfrey Sweetwater 24'
2004 Mercury 90 2-Stroke
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Guests Quote  Post ReplyReply Direct Link To This Post Posted: 06/19/2012 at 8:01pm
I trim mine in or out until the steering feels right. Not too much pull in either direction and the steering feels "light". I trim IN a little when running in semi-rough water for a better ride. The logs seem to cut through the waves rather than bounce over them. In the bigger stuff, I have people move to the middle or rear of the boat and trim out a bit to keep the bow higher so they don't get soaked.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Ten42 Quote  Post ReplyReply Direct Link To This Post Posted: 06/19/2012 at 8:18pm
Well I'm hoping that once I get the new prop on, which will be  A LOT closer than the 19p that is on there now, that I can take it out and run it kind of hard for awhile and mess with the trim and see what I can get out of it. I'm hoping that if I can get it trimmed up a decent amount that that will help with my extremely stiff steering when taking corners under way. It's just going to be a lot of trial and error I think.
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2004 Mercury 90 2-Stroke
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Guests Quote  Post ReplyReply Direct Link To This Post Posted: 06/19/2012 at 8:40pm
Originally posted by thisdj1 thisdj1 wrote:

It's just going to be a lot of trial and error I think.


Yes it is..
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Post Options Post Options   Thanks (0) Thanks(0)   Quote bill and theresa Quote  Post ReplyReply Direct Link To This Post Posted: 06/28/2012 at 8:19am
It seems the two holes  raised my motor solved the problem Now my motor cowling is out of the water and I have a nice wake behind the boat. Thanks for the help. Now if I could get the motor to start easy and stay running I would be happy. It fires right up an dies. The choke solenoid is working
compression is even and over 140. spark is good. It is a 1995 50 HP.Maybe it is time for a trip to my local mechanic.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Woody Quote  Post ReplyReply Direct Link To This Post Posted: 06/28/2012 at 10:39am
Theresa that is pretty common and frustrates us all. It is almost always fuel related. Be sure you have good fresh gasoline, with the proper oil mixture. Run a can or two of SeaFoam through it with the fuel, that often helps clean it up. If you can get to the engine while it is running you can also spray SeaFoam directly into the carbs while racing the engine a bit. If the problem is severe you may have to have a marine mechanic clean the carburators for you. Unless it is a huge problem I would start with the easy one first and just add the SeaFoam to the fuel. Many engines stall this way when first started but then settle down after running for few minutes and then crank and run properly after that.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Guests Quote  Post ReplyReply Direct Link To This Post Posted: 06/28/2012 at 10:46am
Sounds like it runs good one it warms up, so I'm guessing that starting is the only problem?? How did you verify that the primer solenoid is working? What is your starting procedure?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote bill and theresa Quote  Post ReplyReply Direct Link To This Post Posted: 06/28/2012 at 1:14pm
I push in the key while cranking with the throttle only raised a little. I know the solenoid is working because when I push the key in it gets a shot of fuel and tries to keep running. yesterday it took me 5 min to get away from the pier. it ran fine for an hour and a half at all different speeds got back to the pier and shut it ff to get trailer an could not get it started again. Put it on the trailer with winch and came home. I took the cover off and could find nothing wrong. I am limited in my knowledge of the fuel system 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote bill and theresa Quote  Post ReplyReply Direct Link To This Post Posted: 07/18/2012 at 2:57pm
finally out of frustration I took the boat to a marine mechanic. He is cleaning and rebuilding carbs and installing a fuel water seperator. I have a built in tank and when I got the boat it was half full(12) gallons. I was afraid that might be old so I made lawn mower gas out of it and added fresh gas. No help so off to the mechanicAngry
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