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Starts on land but not water

C

CJRH

Member
Messages
2
Reaction score
1
Points
10
Boat Make
Other
Year
1997
Boat Model
Other
Boat Length
19
Hi Folks… have a 120xr mercury sport jet drive engine northstar 1997. Boat will start on land but not on the water. Marina can’t figure out the issue and so have but it on hold until things slow down. Everything worked a month ago with no issues. Any suggestions?
 
Weird the only real difference between water and no water is the exhaust resistance in the water, it is a 2 stroke and they are different so be sure it is breathing in to the carbs and out the exhaust and be sure it has fuel pressure the fuel pumps work off the crank case push/pull on their diaphragm
 
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