kennhis97gs
New Member
Hello everyone, It is mid summer and my baby is having problems at the worst possible time. I could really use some help getting her fixed up and back out on the waves!
I have a 1997 Seadoo GS.
Heres whats going on: 2 weeks ago it was making a very slight jerking motion while WOT, to me it felt like minor cavitation. I would let off on the gas and then tromp on it again and it would clear up and be fine for the remainder of that ride. Park it and come out an hour later same thing only on first WOT and then it would clear up again. So I didnt think much of it, like I said I thought maybe beginning stages of wear ring and impeller wear causing minor cavitation.
That was friday evening and all saturday. Sunday morning I took it out for a ride and it was fine for about 10 to 15 minuntes of good solid riding then all of a sudden at WOT it just seem to lose most of its balls. I let off on the throttle and could feather it back up to WOT, this repeated a few times before I came into shore. I let it cool down and came back out about 2 hours later it was fine for about 5 minutes or so and then it started losing power, jerking and bogging a little worse then last time. Once again most times I could feather it and clear it out for 30 seconds or so before it would get into another "fit".
So I pulled it out of the water and pulled the plugs, one was pretty good, the other slightly fouled, so I changed them with a brand new set, I always use NGK plugs. I left it at that as I had to leave the cottage and go home for the week. I came back up last weekend and dropped her back in to see if the new plugs made any difference. Again about 5 minutes into the ride it starting jerking and bogging and losing power. I checked the fuel filter and it was pretty clean just a little sand in it, very small amount but I cleaned it out anyways. Still same problem. Only the next 2 short rides seemed to be even worse, with it now acting up almost immediately. Someone on shore even told me it sounded different taking off. They said the motor sounded like it had a lower hum to it almost a hollow sound, hard to explain but they said it defiantly sounded different then normal. Also they said they could notice some rattling coming from the back of it, which I know some rattling is normal from the impeller, not sure how to gauge how much noise it was making as I didnt want to send anyone else out on it while I listened in case it broke down on them because I already had to swim it back to shore earlier that day and it was not fun lol.
So thats where I stand with it now. I rechecked the plugs after they had 25 minutes or so of riding on them, half of which was bogging and jerking but they look perfect none the less. Seems to be usual amount of smoke from the exhaust. Starts pretty good cold, a little choke is needed and sometimes a small amount of throttle feathering, but seems to be starting as it always has. This is my second summer with this machine.
Sorry for the long post wanted to give lots of detail as to what was going on and maybe you will require more. I am hoping to get time tomorrow to do a compression test to hopefully eliminate that problem.
The motor has one new cylinder, I know this because it is a slightly different colour from the rest of the motor. The stock colour is a light beige and the replacement cylinder is a darker beige. Not sure what was all done to the motor before I owned it, (new pistons, new rings, head gasket, etc.??) Im assuming if a new cylinder was put in, atleast a new head gasket would of been installed. All I have done to the machine since I owned it is a new fuel baffle, new starter, new plugs, fixed an oil leak (end of hose was in rough shape cut it off and put it back on with a new clamp) and thats pretty much it.
Ok so there you have it sorry once again for my novel lol..any suggestions? Anything would be appreciated thank you. Also I have the shop manual for this machine for reference.
Thanks
I have a 1997 Seadoo GS.
Heres whats going on: 2 weeks ago it was making a very slight jerking motion while WOT, to me it felt like minor cavitation. I would let off on the gas and then tromp on it again and it would clear up and be fine for the remainder of that ride. Park it and come out an hour later same thing only on first WOT and then it would clear up again. So I didnt think much of it, like I said I thought maybe beginning stages of wear ring and impeller wear causing minor cavitation.
That was friday evening and all saturday. Sunday morning I took it out for a ride and it was fine for about 10 to 15 minuntes of good solid riding then all of a sudden at WOT it just seem to lose most of its balls. I let off on the throttle and could feather it back up to WOT, this repeated a few times before I came into shore. I let it cool down and came back out about 2 hours later it was fine for about 5 minutes or so and then it started losing power, jerking and bogging a little worse then last time. Once again most times I could feather it and clear it out for 30 seconds or so before it would get into another "fit".
So I pulled it out of the water and pulled the plugs, one was pretty good, the other slightly fouled, so I changed them with a brand new set, I always use NGK plugs. I left it at that as I had to leave the cottage and go home for the week. I came back up last weekend and dropped her back in to see if the new plugs made any difference. Again about 5 minutes into the ride it starting jerking and bogging and losing power. I checked the fuel filter and it was pretty clean just a little sand in it, very small amount but I cleaned it out anyways. Still same problem. Only the next 2 short rides seemed to be even worse, with it now acting up almost immediately. Someone on shore even told me it sounded different taking off. They said the motor sounded like it had a lower hum to it almost a hollow sound, hard to explain but they said it defiantly sounded different then normal. Also they said they could notice some rattling coming from the back of it, which I know some rattling is normal from the impeller, not sure how to gauge how much noise it was making as I didnt want to send anyone else out on it while I listened in case it broke down on them because I already had to swim it back to shore earlier that day and it was not fun lol.
So thats where I stand with it now. I rechecked the plugs after they had 25 minutes or so of riding on them, half of which was bogging and jerking but they look perfect none the less. Seems to be usual amount of smoke from the exhaust. Starts pretty good cold, a little choke is needed and sometimes a small amount of throttle feathering, but seems to be starting as it always has. This is my second summer with this machine.
Sorry for the long post wanted to give lots of detail as to what was going on and maybe you will require more. I am hoping to get time tomorrow to do a compression test to hopefully eliminate that problem.
The motor has one new cylinder, I know this because it is a slightly different colour from the rest of the motor. The stock colour is a light beige and the replacement cylinder is a darker beige. Not sure what was all done to the motor before I owned it, (new pistons, new rings, head gasket, etc.??) Im assuming if a new cylinder was put in, atleast a new head gasket would of been installed. All I have done to the machine since I owned it is a new fuel baffle, new starter, new plugs, fixed an oil leak (end of hose was in rough shape cut it off and put it back on with a new clamp) and thats pretty much it.
Ok so there you have it sorry once again for my novel lol..any suggestions? Anything would be appreciated thank you. Also I have the shop manual for this machine for reference.
Thanks
