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    • Cummins Marine Forum Topics
    • 6BTA Full Throttle Stall

      This topic has 1 reply, has 2 voices, and was last updated byTony Athens 1 year ago

      August 12, 2022 at 3:31 am 6,100 hours 1990 250hp 6BTA twins. Engines have always run well. Full power run-up today, port engine stalls as soon as it reaches close to 2500 rpm. No throttle movement at the engine to indicate something acting on the throttles. When the revs die down to near idle, engine will restart. Racors clean, no leaks at lift pump or CAV injector pump.Ā   

      Started by: lee.rychel in: Cummins Marine Engines

      1 Reply
      August 12, 2022 at 2:34 pm Most likely, the pick-up in the tank is clogged………….Start by pullingĀ  the dip-tube out of the tankĀ  ..    

      Last Post by: Tony Athens posted: 1 year ago

    • Fuel Dilution in Motor Oil

      This topic has 9 replies, has 4 voices, and was last updated byRob Schepis 3 years ago

      April 3, 2021 at 11:36 am Our 6BTA’s have over 6,000 hours on them. They run beautifully and burn about a quart of oil every 200 hours. I get oil analysis regularly and haven’t seen any issues. This last analysis, for both engines shows a sharp rise in fuel dilution in the oil. Still far below any range of concern, my question is for both engines to spike like this I’m thinking it’s an environmental issue. During this last cycle between sampl…

      Started by: lee.rychel in: Cummins Marine Engines

      9 Replies
      April 7, 2021 at 3:45 am Just to clarify Don’s above comment as to proper propping in case it come up on future searches: The 315/330 is a 2,800 rpm rated engine and should see 2,900++ The 355/370 is a 3,000 rpm rated engine and should see 3,100++

      Last Post by: Rob Schepis posted: 3 years ago

    • Replacing transmission oil cooler 6BTA

      This topic has 1 reply, has 2 voices, and was last updated byRob Schepis 3 years ago

      March 3, 2021 at 4:29 pm Lesson learned in this process. Our 1990 6BTA’s use a silicone elbow to reduce the water flow from the sea water cooling pump to the transmission coolers. This elbow reduces the pipe from 1.5″ to 1.25″, the size of the barb on the OEM cooler. New coolers are 1.5″. Installing the new cooler, I used the silicone 90 degree elbow hose from the sea water pump, and attached it to the discharge end of the new cooler. Coinci…

      Started by: lee.rychel in: Cummins Marine Engines

      1 Reply
      March 4, 2021 at 3:42 am Thanks for sharing Lee. If you have any pics of the finished project please post them.

      Last Post by: Rob Schepis posted: 3 years ago

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