tswilliams

My friend flipped my ski and it filled with water, now it wont crank, i got new spark plugs and replaced the battery. I only get a knocking noise thats all. PLEASE HELP! anything helps!

Ernest T

If its been more than 48 hours since you flooded the ski, then you can bet the engine is totalled. If it was salt water then it would be dead in even less time. When water gets in the ski it passes through open exhaust ports into the engine. To have any chance of preventing damage, you have to immediately pull the spark plugs and crank the engine to pump out as much water as possible, then replace the plugs and get it running again as soon as possible. Then you have to run it long and hard to get rid of residual water. If you can't get it going within a few hours, the engine is going to be seriously damaged.

At this point you will need to pull the engine apart to access the damage. I'd tell your friend to start shopping for a rebuilt engine.

__________________
2008 Yamaha FX HO Cruiser
2010 Hurricane Sundeck 2100

YamaDoo

How long ago did this happen?

98yota

Welcome to the forum! If the water was left in it might be rusted tight. Will it crank with the plugs out? If you haven't tried, fog the cylinders before in order to prevent further damage.

__________________
1993 Yamaha WaveBlaster 701
1989 Yamaha WaveJammer 500