01 yamaha waverunner xlt1200. recently replaced starter and solenoid. ran great a time or two, now, sometimes wont stop starting, or sparks and tries to turn over when hooking up battery cable. so i just replaced another solenoid today (the 4th solenoid in 4 weeks) one crank and had plenty of power for 1 second , now just a buzz coming from brand new solenoid. IT WAS BRAND NEW YAMAHA REPLACEMENT PART. Battery is new. Ground appears to be solid and well grounded. no corrosion on connections, start and stop switches...possible culprits? jumped terminals on solenoid with screwdriver and it slightly turns over. Curious how it can run great a week ago until i replaced outer exhaust joint, no electrical touched, and today 2 more solenoids wont start the motor. im going through solenoids like candy!! any help greatly appreciated.