Saving Old Seagulls

no im trying to cut the smoke down which i think is eventually killing engine as it wont run for more than 5 min and when i put it in drive that makes it smoke more ,also all the oil residua its leaving in the water tub had a similar problem with a jet ski once and that was down to mix being to rich...

ok thanks
there are no other numbers on that jet and none on the longer one either

so will give it a try at 25-1 as 10-1 is just bogging engine down smoking like a cauldron and leaving a lot of oily discharge in my tub

:roll: ive been looking at videos on the web of them running and they are not smoking as much as mine, which is that bad at times you cant see water in the tub even the engine occasionally have read a few similar problems on here and cleaned it all down fresh fuel and its still the same. i have also...

the serial number is WSPC1810D1 says its made april 1971 and is a 5hp Silver Century/90/Osprey

its the jet that i have in carn with 25 thats making me wander if its the mix ratio as ive read it should say 40 or 45

thanks

:roll: newby here so sorry if this has been asked before but done a search and cant find the answer. :shock: i have just acquired a Silver Century/90/Osprey and im having trouble keeping it going it runs for about 5 min with a lot of smoke then dies. i was told by previous owner who had not had it l...