My buddy used quick silver oil in his 2000 Sea Doo GTS. He said that he drained it all out and now he has lost alot of speed and always fouling plugs. After he changes plugs he said it will run ok for about 5 mins and then foul again. The plugs look real dark like it is running real rich. Has he hurt something major or is there something he can do to get it back in good shape? There is only 34 hours on the ski.
Thanks
YAM018
Thanks
YAM018
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