Improper Boat Winterization – Maxum 2300 SR with Mercruiser 5.7L Engine

Boat Make: Maxum

Boat Model: 2300 SR

Boat Year: 1998

Engine Make: MerCruiser

Engine Model: 5.7L GM 350 V8

Engine Year: 1998

WOT Speed: 40 MPH

WOT RPM: 4500 RPM

Condition: This boat was winterized in 2011 however it was never de-winterized or put into service in 2012. The boat was brought in for service in 2013 for preparation to be used that season.

Customer Complaint: #Boat had been sitting, Engine would not crank.

Diagnosis: After checking voltage at the battery and the starter we pulled spark plugs and found water to be sitting inside several cylinders, engine would not turn over with the water and spark plugs out of the engine.

Repair: Replaced the engine with a remanufactured marine longblock……p/nGM350lfi

Conclusion: It was determined that the boat was left uncovered from 2011 – 3013. It was also determined that the boat plug was left installed in the boat throughout this time period. During this time rain collected in the engine compartment which ultimately filled and flooded the engine. The boat owner removed the #boat drain plug while not realizing that water had entered the engine.

**IMPORTANT: Do not leave the boat drain plug installed in the boat when the boat is out of the water. Always remove the plug when the boat is on the trailer or in dry storage. Then re-install the plug at the time the boat is being put into the water for usage.

After replacing the engine and necessary parts the boat performed well and passed the lake test