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Fuel efficiency/speed on Cummins 250B
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Topic author - Junior Member
- Posts: 22
- Joined: Mon Jul 27, 2020 5:37 pm
- Vessel Info: 1999 3000 express
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Fuel efficiency/speed on Cummins 250B
I run about 20knots at around 2400 rpms and I get around 18Gph is my estimate. WOT I am averaging 26knots, they are numbers from days with about 3ft around 7sec..
I looked at the factory specs and numbers are way off as far as speed goes so I was curious.
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- Member
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- Vessel Info: 3000 Express Cummins 4BTA's
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Fuel efficiency/speed on Cummins 250B
Your risking serious engine damage if what you are saying is correct.
Get an accurate WOT throttle reading, you should be seeing 3100 RPM’s in gear under load, 3200/3300 in neutral engine hot.
Get a harbor freight digital tach and find out what those engines are spinning at before they implode.
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- Senior Member
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- Joined: Tue Apr 05, 2011 10:42 pm
- Home Port: Mattituck, Long Island
- Vessel Info: 1999 Pursuit 3000 Express, twin Cummins 4-BTAs
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Fuel efficiency/speed on Cummins 250B
-
Topic author - Junior Member
- Posts: 22
- Joined: Mon Jul 27, 2020 5:37 pm
- Vessel Info: 1999 3000 express
- Has thanked: 1 time
Fuel efficiency/speed on Cummins 250B
-
- Senior Member
- Posts: 583
- Joined: Tue Apr 05, 2011 10:42 pm
- Home Port: Mattituck, Long Island
- Vessel Info: 1999 Pursuit 3000 Express, twin Cummins 4-BTAs
- Has thanked: 9 times
- Been thanked: 84 times
Fuel efficiency/speed on Cummins 250B
-
Topic author - Junior Member
- Posts: 22
- Joined: Mon Jul 27, 2020 5:37 pm
- Vessel Info: 1999 3000 express
- Has thanked: 1 time
Fuel efficiency/speed on Cummins 250B
-
Topic author - Junior Member
- Posts: 22
- Joined: Mon Jul 27, 2020 5:37 pm
- Vessel Info: 1999 3000 express
- Has thanked: 1 time
Fuel efficiency/speed on Cummins 250B
-
Topic author - Junior Member
- Posts: 22
- Joined: Mon Jul 27, 2020 5:37 pm
- Vessel Info: 1999 3000 express
- Has thanked: 1 time
Fuel efficiency/speed on Cummins 250B
-
- Senior Member
- Posts: 583
- Joined: Tue Apr 05, 2011 10:42 pm
- Home Port: Mattituck, Long Island
- Vessel Info: 1999 Pursuit 3000 Express, twin Cummins 4-BTAs
- Has thanked: 9 times
- Been thanked: 84 times
Fuel efficiency/speed on Cummins 250B
- These users thanked the author MarkT for the post:
- Sharkguy05 (Wed Jun 08, 2022 1:30 pm)
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Topic author - Junior Member
- Posts: 22
- Joined: Mon Jul 27, 2020 5:37 pm
- Vessel Info: 1999 3000 express
- Has thanked: 1 time
Fuel efficiency/speed on Cummins 250B
MarkT wrote:Source of the post Maybe back off a little pitch on those wheels.
That's the plan after i verify the rpm's and tachs
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