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    • Cummins Marine Forum Topics
    • How much Boost

      This topic has 1 reply, has 2 voices, and was last updated byTony Athens 3 years ago

      September 16, 2020 at 2:12 pm Is there a spec’d amount of boost for a 330B at various RPM’s? Currently getting about 7# boost at 2250. Engine tops out at 2850. Runs good, runs efficiently, just wondering. Does load effect boost? Thanks, Jim

      Started by: James Graham in: Cummins Marine Engines

      1 Reply
      September 17, 2020 at 5:16 pm Boost is tied into engine by the engines load.. No load (neutral 2200, 2400, 2600, etc = NO BOOST).. 100% full load on you engine pushes 25-27 PSI when all is 100% up to spec & under “perfect conditions”… The condition of the engines aftercooler and turbo will also affect boost as a secondary part of the equation..

      Last Post by: Tony Athens posted: 3 years ago

    • 370 B Won’t go above 2100 1 2 3

      This topic has 53 replies, has 9 voices, and was last updated bybzinger911 3 years ago

      May 26, 2020 at 5:54 am 32 Holland put up for winter, ran perfectly. Launched over weekend and engine won’t go over 2100. Plenty of throttle left. Went to 3000 in fall. No prop change, no nothing changed. No smoke, runs smooth up to 2100. All filters new, no air restrictions. Ran with fuel from a can, ran without air cleaner. Have not adjusted aneroid yet, but not sure how much to turn star wheel for adjustment. Thinking maybe the shaft that operates diaphram …

      Started by: James Graham in: Cummins Marine Engines

      53 Replies
      August 17, 2020 at 9:59 am Aftercooler core and housing brandy new from Sbmar. but here is a question. i have receipts from 2010 for long block replacments . im concerned because the tag on the port motor has a stamp for 230. The turbo and after cooler and marinized parts went back on this new long block. The boat came with and i have the engine tags for the 330s. does the turbo and aftercooler essentually make it a 330 ? Or did the shop that did the swap screw th…

      Last Post by: bzinger911 posted: 3 years ago

    • Fuel Flow Monitoring

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

      July 13, 2020 at 12:14 pm Having to travel further and further these days and I’d like to be able to monitor my fuel usage. Engine is a single 330B. Maretron offers a system with a monitor and 2 sensors, one for supply, one for return. The sensors are available with 1/2 NPT or 3/4 NPT female input openings. Supply on the 330B is 5/8″ hose. The question is do I need to use the sensor with the 3/4 NPT and bush that down to 5/8 or is the 1/2 NPT sufficient? …

      Started by: James Graham in: Cummins Marine Engines

      1 Reply
      July 13, 2020 at 1:10 pm 1/2″ supply on the 330B is good and so is placing the sensor after the SMX DD but before the last chance.

      Last Post by: Rob Schepis posted: 3 years ago

    • Battery Opinion

      This topic has 9 replies, has 7 voices, and was last updated byJames Graham 5 years ago

      November 1, 2018 at 11:52 am Looking for opinions on use of one 8D battery verses two 31 series batteries for one bank. Room and accessibility not an issue. Mainly interested in the house side. Thanks, Jim

      Started by: James Graham in: General Discussion

      9 Replies
      November 9, 2018 at 10:12 am This not a new build. 30 single engine downeast boat, 330B power. DC requirement on the house side is: Furuno TZT2 15L MFD. Fish finder function runs all day. Radar runs when engine runs, Additional Fishfinder FCV 295, runs all day. Furuno GP33 VHF radio Lighting runs when the engine runs for the most part. Three durabrite mini’s, couple of small rigid floods, couple of cabin lights, and running lights. All lighting LED’s. Bilge pum…

      Last Post by: James Graham posted: 5 years ago

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