mercury sportjet 90 setting trim

[RICHRICH26]

Thanks to the wonderful responses from my last topic I have fixed my bayliner jet jazz with a 90 mercury sportjet now I just need to tweak it a little. How to I adjust the trim??? Does the reverse gate need to be totally up and out of the way? I noticed there are two stoppers to adjust and 1 has a nice indention in it it is not from the cable so is the water pushing it up?? any suggestions would be appreciated

 

[Ledif7]

Re: mercury sportjet 90 setting trim

I have a pic of the reverse gate, and it shows it just a little over the diameter of the rudder.If you go to your local public library you can order the book clymer mercury spot jet 623.8231 Clymer. 1993-1995

 

[Ledif7]

Re: mercury sportjet 90 setting trim

Also be very careful if you disconnect the battery. I conected mines the wrong way and fried the switch box and voltage regulator. Had to spend about $ 300.00 unecesarry.

 

[Thena]

Re: mercury sportjet 90 setting trim

Did you find what was wrong with it? I have rebuilt a mercury Sportjet 90Hp for a donzi 152 medallion and it doesnt go faster thatn 25mph<br /><br />The engine seems to work fine. I also checked the impeller and there is no damage.<br /><br />Any suggestions? <br /><br />p.s. How do you actually trim the engine because I have a real problem in getting the boat to plane<br /><br />Thanks

 

[bluegrassmike]

Re: mercury sportjet 90 setting trim

Richrich26 I was wondering what exactly worked for your Sportjet as I am having the same problems.Poor speed ect...,

 

[villaojs]

Re: mercury sportjet 90 setting trim

I have a Donzi 152 Medallion with a 90 HP Sport Jet engine. I was reading all your articles and have experienced the same problems. Right now my main problem is fuel flow. How do you rebuild the fuel pump?

 

[kenimpzoom]

Re: mercury sportjet 90 setting trim

If you are having problems getting on plane check you have spark on all three cylinders using a timing light. Also, I suggest you change all the spark plugs as they can be bad and still look fine (I had this happen to me last week).<br /><br />Usually if you cant get on plane, it is due to a lack of power, and usually if one out of three cylinders is not working, that is enough power loss to have problems, but it will idle and sound fine.<br /><br />Ken