what caused my problem on force 90

[galla sa]

yesterday i took my boat out. at first it didnt wanna start then it started up. eveything looked ok so i went i felt a sudden loss of power and when i looked back i saw a lot of steam coming out the back(i thought it was smoke) switched it off immediately and took it out the water. at home i took out the plugs and found water on the middle cylinder. so i took the head off and found that the gasket went. now i want to know what happened???????? did my waterpump go and the heat made the gasket fail???????????? and if so what must i check now and service while im going to do these repairs to my motor. i checked the sleeves and pistons they all seem to be looking ok and also what can i do to make the motor to perform a little better(maybe take a little bit off the head) or is it a stupid idea. what else can i do to put up the prformance. it is a 1994 force 90 hp

 

[steelespike]

Re: what caused my problem on force 90

G S,Would be very good if you gave us the year or model number. An overheat could have caused your head gasket failure.,and it could just be a spontanious failure.Check the head and block face for damage and warping with a good straight edge.<br /> Get a service manual and replace the head gasket.<br /> be careful to follow the torqing procedure.Change thermostat and water pump while you are at it<br /> Dont mess with copmpression or other performance<br />alterations.Use your manual to be sure everything is tuned and adjusted correctly.Once your sure of tune etc. consider a prop change.You will need to know your present wot max rpm and your present prop pitch.Generally speaking less pitch gives better hole shot but less top end, more pitch<br />give more top end and less hole shot.Of course this all depends on where you are at now.<br /> Im not an expert but after your sure of tune and prop I would consider changing the reeds.Boysen reeds are supposed to improve performance.Dont Know cost or how difficult the install is.There is a web site.Im sure if you do a search on this forum there have been discussions on reeds.<br /> Good luck.

 

[galla sa]

Re: what caused my problem on force 90

yes sorry spike it is a 1994 force 90hp. i was just looking into stuff like that(compression)but now i know not to fool around with stuff like that. i think it might have been caused by my waterpump failing