Cummins 6BT Lift Pump Leaking?

[Tim Olson]

My new to me trawler has a single Cummins 6BT M3 220 HP engine (cpl 8206). I’m seeing a small accumulation of fuel at the lift pump (Cummins part # 3904374) but can’t find where the fuel leak originates. The input/output pump connections are dry and the engine mounting bolts are tight. 

The fuel accumulation is happening with the engine off. The engine starts and runs fine.<br /><br />Should I just replace the pump?  Any tips on installing it? <br /><br />

Do I need to shutoff the fuel supply until I get the pump replaced?

Thanks!

Topic

[Tim Olson]

Thanks Tony! Good to know that at least I can run the boat and have some time to plan the fix. Appreciate the peace of mind!

Cheers,

Tim

[Tony Athens]

Casting porosity leak??  Don’t know———-You could take all apart, and put all back together using Rectorseal #5 on every thread & fittings?  .  Or just buy a new pump?? Either way, nothing looks mission disabling and a diaper can certainly contain it.

 

 

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