Prop and motor mount questions

[hicvegas]

I just bought a used jc neptoon d20 with a 1991 johnson 88hp motor. I was out on the water and noticed the prop seemed to be kicking up a lot of water. I don't know if this is normal since I have never owned a pontoon before. Later in the day a small storm came threw and produced some pretty big waves. WHen I was driving back to the ramp waves were crashing onto the bow of the boat. At one point it was taking in so much water in the front it seemed like the front was going under. Could the two be related? Could the motor be installed to high or could I have the wrong kind of prop that doesn't keep the bow high enough out of the water? I would really appreciate some advice so I don't sink my boat. Also the last two times I trailored it, as I was pulling onto the trailor the motor stopped and seemed like it was getting no power however the radio and lights were still working. Any thoughts?

 

[flycaster]

Re: Prop and motor mount questions

Is the motor a "BIG FOOT"???
How far below the toons does the prop sit???
It sounds like the prop is sitting to high in the water.

 

[Silvertip]

Re: Prop and motor mount questions

Or you were over trimmed down thus driving the nose of the toon into the waves. Your motor very likely is a 20 inch leg so that's not the issue with the "excess water" which is sort of a nebulous description. Pontoons need a pontoon specific prop for best performance. A four blade - elephant ear prop with larger blade area works best. If you look at one of those vs a standard prop you will see a distinct difference in blade shape. You can check the hub or barrel of the prop for prop part number or diameter and pitch info. Post what you find. It is quite possible the engine is simply not propped correctly.

 

[Jeep Man]

Re: Prop and motor mount questions

Sounds like your motor is NOT a long shaft. Standard length, commonly called short shaft motors are not long enough to work properly on a pontoon boat. The only way for these to operate is to be all the way down which will cause the bow to nosedive somewhat.