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Viewing 8 topics - 1 through 8 (of 8 total)
    • Cummins Marine Forum Topics
    • cooling water pressure

      This topic has 2 replies, has 3 voices, and was last updated byEdwin Harvie 2 years ago

      May 26, 2021 at 3:57 pm QSB 380 always 176 Deg. @2,000RPM. I have Borel exhaust alarms but I was wondering if itā€™s a good idea to have an actual water pressure gauge. I always had them on my outboard and they were a great way of seeing trouble before itā€™s costly. I am 150 hours on my impeller and will change it out this week. I put a gauge on the 1/4ā€ npt outlet port on the top of my Sherwood pump for testing. I got 4lb at idle and 13lb at 1,800 rpm. I donā€™t know if th…

      Started by: Fireisland1 in: Cummins Marine Engines

      2 Replies
      May 27, 2021 at 11:05 am yes. details here: raw water alarm options I see 6-7 psi at 2300rpm cruise on a Sherwood GC5 pump. Barely registers at idle

      Last Post by: Edwin Harvie posted: 2 years ago

    • smartcraft gateway

      This topic has 4 replies, has 5 voices, and was last updated byCorey Schmidt 3 years ago

      September 10, 2020 at 10:07 am i would like to get the engine display on my Garmin 5212. SBMAR stated nmea 2000 smartcraft gateway for my application. i would like to know what data i can display . i want to keep my old smartcraft working at the same time . does anyone have a screen shot of what it would look like?

      Started by: Fireisland1 in: Cummins Marine Engines

      4 Replies
      December 27, 2020 at 2:58 pm Sounds like either a bad SIM Module or a bad physical harnessing connection… that’s where I would start

      Last Post by: Corey Schmidt posted: 3 years ago

    • Ignition source QSB

      This topic has 5 replies, has 2 voices, and was last updated byTony Athens 3 years ago

      October 4, 2020 at 8:35 am I want to hook up a water pressure alarm. It would be ideal if I had a 12v key on source at the engine. Much easier then running up to the helm. Alarm would draw less then 1 amp. Is there a location or HermĆØs connection available on the engine ? Smartcraft gauge and harness 2008.

      Started by: Fireisland1 in: Cummins Marine Engines

      5 Replies
      October 4, 2020 at 2:43 pm Your answer is in the attached–You need to learn your engine..

      Last Post by: Tony Athens posted: 3 years ago

    • QSB fuel burn/ load

      This topic has 9 replies, has 5 voices, and was last updated byRob Schepis 4 years ago

      July 14, 2019 at 5:52 pm Can someone review my data sheet. I almost always run my boat at 2000RPM . But it is burning more fuel then the Cummins graph shows it should. I donā€™t care as it it very efficient but I do not want to do any long term damage. I donā€™t know if you can actually get an engine to burn the exact amount across the board. My data is very accurate and hardly changes with load and Sea condition. Is this typical ? 450 hour engine, all gauges are within s…

      Started by: Fireisland1 in: Cummins Marine Engines

      9 Replies
      July 26, 2019 at 2:58 am Got to be realistic as he is running so far below the top, the engine wonā€™t care.. Look at the 300 MCD curve.. Same exact engine.

      Last Post by: Rob Schepis posted: 4 years ago

    • Jog Steering

      This topic has 10 replies, has 4 voices, and was last updated byjohn 5 years ago

      October 26, 2018 at 5:48 pm I finally got around to installing jog steering in my Downeaster. I used an Octopus variable piston pump, a reversing relay and 2 HD soft switches. The pump output is adjustable. I have it set for 11 seconds full sweep. Seems to work as planned.

      Started by: Fireisland1 in: General Discussion

      10 Replies
      October 29, 2018 at 6:09 am Fireisland1 wrote: Thanks Rob. Iā€™m a pretty good inventor. The only problem is most of my inventions already exist. I should get out more. Yes itā€™s tough when you have to compete with a nice lever like Tony put up. All in one. Itā€™s alway nice to have the ability to make your own and watch it work. Another question for tony. Why the two pumps with the accusteer pump setup?

      Last Post by: john posted: 5 years ago

    • Jog Steering

      This topic has 7 replies, has 3 voices, and was last updated byCorey Schmidt 5 years ago

      September 18, 2018 at 5:01 pm My off season project is to install jog steering in my Downeaster. I looked at Tonyā€™s set up . I talked to Kobelt and they suggested a continuous duty CPU-100 pump. The math would give me a 4 sec. full stroke with that pump. I think this might be a better choice then a reversible pump. Iā€™m aware the amp draw is higher but I can handle that. I do not have auto pilot and do not want it at this point. Any thoughts on this would help. The pump,is…

      Started by: Fireisland1 in: General Discussion

      7 Replies
      September 20, 2018 at 9:08 am From what I can see, that is a very heavy duty adjustable pump that will serve you well… everything is built in to the design including solenoid control, passive steering input and power out. I think you will be very happy with it. Never used one yet, but we may have to add that pump series to our lineup!

      Last Post by: Corey Schmidt posted: 5 years ago

    • QSB exhaust-out with the old

      This topic has 11 replies, has 4 voices, and was last updated byRob Schepis 6 years ago

      January 14, 2018 at 4:23 pm I took the sound advice from this forum. I removed the stock Cummins exhaust and had a new custom shower head made. Now all the water is down stream. The old exhaust came off and looked new with no corrosion anywere, but I plan on keeping this boat for a long time so I thought it was best to avoid future problems. The water hose is close to turbo heat so I will adjust that next.

      Started by: Fireisland1 in: Cummins Marine Engines

      11 Replies
      March 12, 2018 at 6:20 pm Gotcha. BTW, the Borel bands temperature setpoint is 167 deg F, atleast that was what the prior bands were.

      Last Post by: Rob Schepis posted: 6 years ago

    • Qsb 380 oil temp.

      This topic has 18 replies, has 7 voices, and was last updated by28Cuttyhunk 6 years ago

      November 3, 2017 at 4:44 pm I have read the spec sheet here and it shows oil temp 260 deg. Max { sump }. My smart craft shows I am running at no more then 249 deg. On warmup I see it climb past a bit then drop to 240 then creep up again to 249. Is there a thermostat opening at that point? Is this normal or too close. My pressure and water temp are normal. Also what do they mean by sump? Thanks ahead.

      Started by: Fireisland1 in: Cummins Marine Engines

      18 Replies
      November 5, 2017 at 6:28 pm Bill, I might know where you can find a hull…..

      Last Post by: 28Cuttyhunk posted: 6 years ago

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Viewing 8 topics - 1 through 8 (of 8 total)