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| 298 burns more fuel on port vs starboard https://www.smwebhead.com/phpBB3/viewtopic.php?f=6&t=13287 |
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| Author: | Family knot [ Sun Aug 03, 2014 5:54 pm ] |
| Post subject: | 298 burns more fuel on port vs starboard |
Hello I am consistently burning upto a third more fuel on the port engine. I don't trust my gauges completely but I run the RPM gauges evenly. I rely mostly on the sound of the engines being the same and an even rooster tail/wake from the drives. Any similar experiences? |
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| Author: | rpengr [ Sun Aug 03, 2014 7:20 pm ] |
| Post subject: | Re: 298 burns more fuel on port vs starboard |
That sounds like way too much of a difference. As a diagnostic tool, I would see if both engines reach the same RPM at Wide Open Throttle. Also, is there any chance that the one has a damaged prop? |
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| Author: | firecadet613 [ Sun Aug 03, 2014 7:41 pm ] |
| Post subject: | Re: 298 burns more fuel on port vs starboard |
On my SmartTach, my port burns .3 gal/hr more than my starboard motor. Has for the two years I've had the boat. |
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| Author: | Thalasso [ Sun Aug 03, 2014 9:51 pm ] |
| Post subject: | Re: 298 burns more fuel on port vs starboard |
How are the shutoff valves set on the fuel lines. Port on, Stb on, center one off. If the center is open it is possiable it's drawing from both tanks |
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| Author: | 298VISTA2000 [ Mon Aug 04, 2014 6:49 am ] |
| Post subject: | Re: 298 burns more fuel on port vs starboard |
Thalasso wrote: Port on, Stb on, center one off. If the center is open it is possible it's drawing from both tanks This is what I would think the issue is because that is too much of a difference. |
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| Author: | TFD2001 [ Mon Aug 04, 2014 7:58 am ] |
| Post subject: | Re: 298 burns more fuel on port vs starboard |
298VISTA2000 wrote: Thalasso wrote: Port on, Stb on, center one off. If the center is open it is possible it's drawing from both tanks This is what I would think the issue is because that is too much of a difference. That was my experiences.. When I set my valves up to draw from both, it always seems to draw from one more than the other. So, I just leave it set to draw port to port, and starboard to starboard.. |
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| Author: | Paul I. [ Tue Aug 05, 2014 8:51 am ] |
| Post subject: | Re: 298 burns more fuel on port vs starboard |
I would not trust the analog guages for exact numbers. I installed 2 fuel flow sensors that are NMEA2K and use my GPS for better, GPH and MPG. As to RPMs, the boat came with both a digital read out and analog and the digital read out is a lot better to fine tune it. It is normal for one engine to burn more than another. One third is a little high. |
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| Author: | rpengr [ Tue Aug 05, 2014 10:37 am ] |
| Post subject: | Re: 298 burns more fuel on port vs starboard |
Paul I. wrote: I would not trust the analog guages for exact numbers. I installed 2 fuel flow sensors that are NMEA2K and use my GPS for better, GPH and MPG. As to RPMs, the boat came with both a digital read out and analog and the digital read out is a lot better to fine tune it. It is normal for one engine to burn more than another. One third is a little high. I would expect that two engines performing the same amount of work would run within 5% on fuel. 10-15% at the very most. I have been wondering if those fuel flow sensors would work with a Carbureted engine. I would think they would surge up and down as the float valve bounces around, but would it keep a good running total to be able to compute gph and mpg? |
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