I have recently rebuilt a sportjet 90Hp engine. New pistons, gasket sets e.t.c. <br /><br />I also checked the impeller and it is not damaged. The engine is mounted on a donzi 152 medallion. The boat has extreme difficulty coming to plane and when it does it tops at 25mph<br /><br />What could be wrong?? My mechanic says the engine is working fine. How can I check it? <br /><br />I've tried to find specs for the engine i.e. revs, compression e.t.c. but no luck.<br /><br />Does anybody know where I can find these?<br /><br />Also is there any way I can trim the engine so the boat planes better?<br /><br />Keep in mind I am writing from Greece and Jet-boats here are no that common. Most mechanics dont have a lot of experience in fixing them!!<br /><br />p.s. by engines serial no is: OEO54226<br /><br />Was there any specific defect with these engines? Is there a way of improving them by changing a part e.t.c<br /><br />Thanks a lot<br />Lucas
