Hi, serial number 1c1 50827
Bought 2011 boat and motor and prior to purchase had it checked out at local boat dealer. Boat had sat for a year. They said motor had 25.5 hours and recommended oil change, lower unit fluid and water pump.I did that.
Then I siphoned out fuel and replaced with ethanol free fuel. I idled it for 15 minutes with muffs and replaced both fuel filters.
Took boat to lake and it popped right up on plane and ran for a couple of miles and then started cutting out and revving back up with rpm's jumping between 6000 and 4500 or so. If I come to a stop and turn motor off or just idle and get back on plane it takes a mile or so before it begins again.
Thought it might be electrical so I replaced the plugs. No change.
Any ideas? Thank you in advance.
Jeff