put my 2005 yamaha 2000 4 stroke in for a 100 hour service. here is what they did
Compression Test - Good (140-155 psi)
Spark Check - Good
Lube
Check Faults on Computer - No error codes
Change:
Engine Oil
Oil Filter
Fuel Filter
Impeller
Gear Oil
Spark Plugs
heres the problem. the motor runs...