Cavitation/Aerateing Problem?

[pjt123]

Re: Cavitation/Aerateing Problem?

It is the long shaft and placed all the way down in the bottom hole set. After playing with it a while I have leanred that initially upon takeoff I have to raise the trim to avoid a "shuddering " feeling, and if I continue to accelerate If I bring the trim back down it seems to do much better. Seems a little odd to me but that is what is working. I have also pulled the plus in the pontoons and drained almost 20 gallons of water, that was probably not helping matters. Good news is the problem is at least manageable now, thanks to all who responded.

where do I find the plus, so I can check for water in the pontoons?

 

[stevetedder]

Re: Cavitation/Aerateing Problem?

The plugs in mine are located on the back of the pontoon,if yours are there too then be careful when removing them as not to tear anything loose that shouldnt be.

 

[MIKEYLIKESIT]

Re: Cavitation/Aerateing Problem?

The plugs in mine are located on the back of the pontoon,if yours are there too then be careful when removing them as not to tear anything loose that shouldnt be.

I was just reading this thread because I'm having the same problem. I have an 18' Sun Tracker with a 70hp Johnson. I don't seem to have any
plugs in my pontoons. Is this normal? I thought it was sitting a
little low in the water, but not real sure. First pontoon for us.

 

[lncoop]

Re: Cavitation/Aerateing Problem?

I was just reading this thread because I'm having the same problem. I have an 18' Sun Tracker with a 70hp Johnson. I don't seem to have any
plugs in my pontoons. Is this normal? I thought it was sitting a
little low in the water, but not real sure. First pontoon for us.

In many cases the plugs have been added. If your barge is trailered jiggle the tongue and listen for sloshing in the tubes. If you hear any take it to a good aluminum welder. He or she will perform a pressure test and repair any leaks. Unless you really have a problem a c note should just about cover it.

 

[EricJRW]

Re: Cavitation/Aerateing Problem?

Have you always had this prop problem, or is it a recent problem? Possibly you have a spun prop.

Ive had the prob. since I had the boat. I Had thought that about the spun prop also,but I made a mark running from the bolt in the center out into the prop. A couple of trips later it still lines up. That wouldnt be the case with a spun prop or would it ?

Very clever of you! I was about to suggest the same thing as Jeep Man, yet you already did what took me weeks to figure out to do. In my case it was a spun prop.