Cablebandit
New Member
I just bought a 96 seadoo speedster with 2x rotax 717. First day out it ran great. Now the port motor is acting up.
symptoms: It runs pretty normal for about 30 secs in the water and will rev to 7000 rpm under load but then starts losing rpm and bogging like its starving for gas.It gets worse until finally it struggles to make 3000-4000 rpms. Idle for a few minutes and it is able to gain more rpm but goes right back to bogging and losing more and more rpm.
Solutions tried:
I've rebuilt the carbs for that motor. The filters were spotless as well as the inside of the carbs. The fuel sending unit in the tank is spotless. The filter on the "firewall" is spotless. Overall the fuel system is really clean. I swapped the rebuilt carbs to the starboard side and the problem did not follow the carbs to the starboard side so Ive eliminated the carbs. It runs the same whether the fuel shutoff/flow/reserve valve is in reserve mode or full fuel mode. I do not have the grey fuel lines. I've pulled the choke while it is bogging and that kills the motor.
This doesn't seem to be fuel related. The plugs are new recommended NGK 8 gapped at .22 and the tips are screwed on tightly. Compression is at 150psi
What do you guys think is the next logical step. With the exhaust exiting in the water, it is hard for me to get a sense of any misfiring or anything like that. It doesnt sound/feel like one cylinder dropping as the whole engine bogs down. Starboard motor runs like a champ
symptoms: It runs pretty normal for about 30 secs in the water and will rev to 7000 rpm under load but then starts losing rpm and bogging like its starving for gas.It gets worse until finally it struggles to make 3000-4000 rpms. Idle for a few minutes and it is able to gain more rpm but goes right back to bogging and losing more and more rpm.
Solutions tried:
I've rebuilt the carbs for that motor. The filters were spotless as well as the inside of the carbs. The fuel sending unit in the tank is spotless. The filter on the "firewall" is spotless. Overall the fuel system is really clean. I swapped the rebuilt carbs to the starboard side and the problem did not follow the carbs to the starboard side so Ive eliminated the carbs. It runs the same whether the fuel shutoff/flow/reserve valve is in reserve mode or full fuel mode. I do not have the grey fuel lines. I've pulled the choke while it is bogging and that kills the motor.
This doesn't seem to be fuel related. The plugs are new recommended NGK 8 gapped at .22 and the tips are screwed on tightly. Compression is at 150psi
What do you guys think is the next logical step. With the exhaust exiting in the water, it is hard for me to get a sense of any misfiring or anything like that. It doesnt sound/feel like one cylinder dropping as the whole engine bogs down. Starboard motor runs like a champ
