runs for 25 seconds then stops

[240 Sundancing in AZ]

2000 searay Sundancer Merc 5.0 thunderbolt ignition 102 hours on moptor ( genuine) bravo 2 drive.
Changed the oil/filter this weekend. Went to the lake and the motor ran for 25 seconds then stopped over and over again. Engine actually got warmed up ( in 25 second increments!) so was at operating temp. Took off the air cleaner - still did it, open the choke flap ( when running ) - still died in 25 seconds.
Any ideas? Thanks!

 

[chaparall villain 2]

Re: runs for 25 seconds then stops

check fuel filter and fire to plugs i would tend to believe fuel problem also check tank vent and make sure its clear ... i believe if it was the vent it would run longer before dieng ... good luck

 

[Don S]

Re: runs for 25 seconds then stops

Very common problem, look at the connections on the oil pressure switch that controls the fuel pump. Corroded wiring or a faulty oil pressure switch will allow the fuel pump to work only while cranking, but not while running.
Look at this wiring diagram, I think it will understand.

 

[240 Sundancing in AZ]

Re: runs for 25 seconds then stops

this is great - thanks guys for the support! I will check all th is stuff out - thx!!

 

[240 Sundancing in AZ]

Re: runs for 25 seconds then stops

corroded purple wire connector to the oil pressure switch. Must have dislodged it when I changed the oil filter..thx