Logo
FULL SITE MENU

Water in crankcase

R

rocking4d

New member
I have a 2006 NSF4BD Nissan 4hp 4 stroke outboard. Red warning light came on and I noticed there is water in the crankcase. Drained oil and refilled. Ran perfectly for about 30 minutes than died. Water back in the crankcase. Sparkplug looks clean and not fouled. Must be a bad seal or gasket that's allowing water to enter the crankcase. Questions are: What are the locations and part numbers of the gaskets or seals that would allow water to enter the crankcase? Any thoughts on which gasket or seal t would be?
 
There are a few possibilities. If you overheated the motor, a head gasket is likely. For that matter, a cracked head or block could be to blame. Likewise could be a problem with a gasket at the oil pan. FWIW, after water contamination, you would typically need to change the oil a few times (with brief run in between) to purge all the old stuff. You can get a complete gasket set and go through the whole thing for an affordable price:
3AS871210MPOWER HEAD GASKET SET 4B/5B/6B$47.39
 
Back
Top