90 Mercury Sport Jet won't move in water

[medicmike20]

I have a 90hp sportjet in a 16'1995 Donzi. The motor runs great out of the water, but when it is in the water, I cant get over +/- 10mph. The RPMs won't go up either. The jet is clear of debris. I have checked everything I can think of, but everything seems normal. PLEASE HELP!!!

 

[JB]

Re: 90 Mercury Sport Jet won't move in water

First help is moving this to Merc troubles.<br /><br />The engine is not running great out of the water, it just seems that way because there is no load on it.<br /><br />You are probably down a cylinder or two.<br /><br />Good luck.