Hello, So I 4 months ago I bought a 1996 Seadoo XP that I have been wanting for a long time, I think its completely stock, I brought it home and performed the following things.
Full carb kit rebuilds on both carbs with genuine Mikuni carb kits w/new needle and seats and I used the same springs that was already in the carbs -- pop off pressure like 32 or 33psi, new stainless steel hex head screw hardware through both carbs (replacing the in my opinion easily wallard out phillips screw heads that come wit the mikuni) High speed needle zero turns out and low speed I think is 1 turn out I set it at whatever the manual said was a stock.
New wear ring OEM with pump oil change and neoprene seal
Replaced grey tempo lines with Tygon 4040A yellow lines, all breather hoses everything
Replaced fuel selector (thanks Chris @ watercraft magic)
RAVE vale bellows, retaining springs and gaskets and cleaned all, Red caps set flush (thanks Chris @ watercraft magic)
Small Skidoo vented oil tank for rotary valve lube for the Premix conversion and Im running 93 or 91 Octane with Seadoo XPS full synthetic oil@ 40:1 ratio
New clear Vinyl cooling lines all around
Did the rotary valve timing with the plastic degree wheel using the instructions from the seadoo manual
New Gaskets: rotary valve intake manifold, Carb to intake manifold, headpipe on the jug side and the tuned pipe side, pulled the exhaust cupler clamp thing and reseated it and used the red high temp gasket maker. (thanks Chris @ watercraft magic for my complete gasket kit)
Oil pump removed and oil block off kit installed (thanks Chris @ watercraft magic for the block off kit)
Found a water leak on the bottom of the tuned pipe freeze plug had a 1/4" billet aluminum disk welded over it. (thanks again to Chris at Watercraft Magic for telling me to look for that leak)
Pulled the waterbox regulator valve it moves fine and was not clogged/ Screwed red cap all the way down then out three turns per the seadoo manual
New electrical rectifier
Fuel screen inside the tank checked and is clean, water/fuel separator took apart cleaned
New Floyd Bell chirper
Ok so I think that was everything I have done so far and here is my problem. The ski barks right off and runs fine even from dead cold and runs fine on the water hose, I put it in the water and it runs good there too lots of grunt on the bottom end (but only from like 35% throttle or so-see later in explanation) and scary top end power and speed. The only thing is that from 0% to about 30% throttle is kinda blah its like all the same amount of power not really planed off just kind of lugging but not bogging or acting funny just 0% to about 30% throttle seems like its all the same-ish and its not super crisp like i can slam it from a dead stop to WOT and there is probably a 3/4 of a second delay but ALL the power is there when it does hit and its not building up to the power when it hits its all there all at once. If you push it past that 30%-ish throttle amount toward 40% throttle it comes unglued with tons of power.
Other than that Im totally happy with this ski I love it I just need to get the power-band ironed out and ill be gtg.
thanks for the input guys ill be running to the garage to try the suggestions as they come in lol
Full carb kit rebuilds on both carbs with genuine Mikuni carb kits w/new needle and seats and I used the same springs that was already in the carbs -- pop off pressure like 32 or 33psi, new stainless steel hex head screw hardware through both carbs (replacing the in my opinion easily wallard out phillips screw heads that come wit the mikuni) High speed needle zero turns out and low speed I think is 1 turn out I set it at whatever the manual said was a stock.
New wear ring OEM with pump oil change and neoprene seal
Replaced grey tempo lines with Tygon 4040A yellow lines, all breather hoses everything
Replaced fuel selector (thanks Chris @ watercraft magic)
RAVE vale bellows, retaining springs and gaskets and cleaned all, Red caps set flush (thanks Chris @ watercraft magic)
Small Skidoo vented oil tank for rotary valve lube for the Premix conversion and Im running 93 or 91 Octane with Seadoo XPS full synthetic oil@ 40:1 ratio
New clear Vinyl cooling lines all around
Did the rotary valve timing with the plastic degree wheel using the instructions from the seadoo manual
New Gaskets: rotary valve intake manifold, Carb to intake manifold, headpipe on the jug side and the tuned pipe side, pulled the exhaust cupler clamp thing and reseated it and used the red high temp gasket maker. (thanks Chris @ watercraft magic for my complete gasket kit)
Oil pump removed and oil block off kit installed (thanks Chris @ watercraft magic for the block off kit)
Found a water leak on the bottom of the tuned pipe freeze plug had a 1/4" billet aluminum disk welded over it. (thanks again to Chris at Watercraft Magic for telling me to look for that leak)
Pulled the waterbox regulator valve it moves fine and was not clogged/ Screwed red cap all the way down then out three turns per the seadoo manual
New electrical rectifier
Fuel screen inside the tank checked and is clean, water/fuel separator took apart cleaned
New Floyd Bell chirper
Ok so I think that was everything I have done so far and here is my problem. The ski barks right off and runs fine even from dead cold and runs fine on the water hose, I put it in the water and it runs good there too lots of grunt on the bottom end (but only from like 35% throttle or so-see later in explanation) and scary top end power and speed. The only thing is that from 0% to about 30% throttle is kinda blah its like all the same amount of power not really planed off just kind of lugging but not bogging or acting funny just 0% to about 30% throttle seems like its all the same-ish and its not super crisp like i can slam it from a dead stop to WOT and there is probably a 3/4 of a second delay but ALL the power is there when it does hit and its not building up to the power when it hits its all there all at once. If you push it past that 30%-ish throttle amount toward 40% throttle it comes unglued with tons of power.
Other than that Im totally happy with this ski I love it I just need to get the power-band ironed out and ill be gtg.
thanks for the input guys ill be running to the garage to try the suggestions as they come in lol
