2004 Polaris Freedom, Virage, Genesis and MSX-140 Service Manual., Page 169Get this manual
FUELEXHAUST SYSTEMS FICHT Troubleshooting"ENGINE DIESLOSES POWERNO TOP END" -
Inspect engine compartment for exhaust leaks
Verify PLANETt resonators are secured and gear clamps are tightRemove water injection hose from top of pipeClean and repair any broken or loose connectionsCheck for proper gap and electrode integrityWR45v circuit should "bleed" down slowly after engine quits runningReference sensor data using DIt softwareObtain known-good EMMAttach and 12 pin harnesses from boat to test EMMUse ENGINE MONITORING screen and run engineRun engine at 3000 RPM while dropping each cylinderTest will "lock" ignition timing at predetermined numberFuel pressure while running tests should be between 20 and 30 psiLook for carbon depositsClean posts and apply Nyogel to posts
Inspect hoses for holes, signs of melting, cracking, etcInspect orifice size and clean screen