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    • Cummins Marine Forum Topics
    • One motor not making full RPM

      This topic has 10 replies, has 3 voices, and was last updated bymatt.schaefer86 3 years ago

      August 8, 2020 at 7:29 am Twin 6BTA 330. Here is the situation We were coming in from fishing yesterday and running down swell so I went to push the boat to a higher cruise. That is when I discovered that the starboard motor would only achieve approx 2250rpm. It would hit 2250 on the normal spot on the throttle lever the. You could just keep advancing it and nothing would change. The port motor would rev higher. I went into the engine room while running and I could push …

      Started by: matt.schaefer86 in: General Discussion

      10 Replies
      August 10, 2020 at 5:58 am (Your may need to install a boost gauge and a fuel PRESSURE gauge on the suspect engine to sort this out, or bypass the aneroid with a 20 PSI air pressure source to keep troubleshooting) Tony Can you describe this procedure of bypassing the Android?

      Last Post by: matt.schaefer86 posted: 3 years ago

    • Muriatic acid flush

      This topic has 2 replies, has 3 voices, and was last updated byJohn 4 years ago

      March 31, 2020 at 2:23 pm Iā€™ve been Searching the forums and havenā€™t seen the exact flow recommended for flushing the raw water side with pool acid. Iā€™ve seen to use 10:1 ratio. Can someone comment on the Work flow? How long to let it run through the engine. How long to let it sit and so on. Thanks

      Started by: matt.schaefer86 in: General Discussion

      2 Replies
      April 5, 2020 at 9:36 am Matt, This is a recent response I made in a trawler forum, on a post asking about Barnacle Buster, and a cheaper solution for a flush. “I did a Barnacle Buster recirculating flush a few years ago. Works great and something you should do every once and a while. What I’ve been doing every year at the time I winterize the boat, is to soak the raw water system with a product called “Acid Magic”, about $20 a gallon. Acid Ma…

      Last Post by: John posted: 4 years ago

    • Cummins repower exhaust questions

      This topic has 3 replies, has 3 voices, and was last updated bymatt.schaefer86 5 years ago

      March 29, 2019 at 8:08 pm The 33 Tiara repower questions continue. The boat currently has 3208t 320hp. With lift mufflers. It appears that it is going to be quite difficult to switch away from the lift mufflers because of space constraints. What is this forums opinion on this style of exhaust. Also, the boat has a bypass raw water cooling line that dumps at the end of the exhaust. I believe this is because of the lift muffler. If I was to reuse the lift muffler system. …

      Started by: matt.schaefer86 in: General Discussion

      3 Replies
      April 4, 2019 at 5:01 am Thanks Tony for your thoughts. Hopefully these pics tell the story.

      Last Post by: matt.schaefer86 posted: 5 years ago

    • Cummins repower transmission questions

      This topic has 6 replies, has 5 voices, and was last updated bymatt.schaefer86 5 years ago

      March 27, 2019 at 8:11 pm Avid reader, New to posting here. All info appreciated Repowering a 1989 33 Tiara fly bridge. It currently has 3208T 320hp. Planning to swap to 6BTA 330-370hp. I’m sure I will have a million questions for this forum but I need to start with what transmissions can work. A friend has the same boat repowered with Cummins and his transmissions are 10deg down angle. I have found a good set of ZF 80a. Which I believe is a 8 Deg down angle. Is 2 …

      Started by: matt.schaefer86 in: General Discussion

      6 Replies
      March 31, 2019 at 6:37 am There are twin disc in there now. The 3208 sit on a huge angle. Iā€™m pretty sure the twin disc have no down angle. I think the Cummins are supposed to go In as close to flat as possible.

      Last Post by: matt.schaefer86 posted: 5 years ago

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