Notices
Like Tree4Likes

Troubleshooting fuel economy

Old 06-13-2019, 09:08 AM
  #1  
Admirals Club Admiral's Club Member
Thread Starter
 
Join Date: Jun 2015
Location: Martha's Vineyard, MA
Posts: 321
Default Troubleshooting fuel economy

Trying to help my friend with his fuel economy problem. He has a Triton 2286, with a verado 250. He’s got a 19P prop and get about 1.2-1.5 when cruising. That seems super low to me. His top end speed and rpm are 5600 @ 40mph.
Any idea on what we should try first?
MVFisherman is offline  
Old 06-13-2019, 09:12 AM
  #2  
Senior MemberCaptains Club MemberPLEDGER
 
Join Date: Apr 2001
Location: East Central Florida
Posts: 5,900
Default

40MPH seems awfully slow for a 22ft with 250HP. Should be close to 50+ MPH and around 3MPG.

Where is the speed/mpg data coming from?
Onewolf is offline  
Old 06-13-2019, 09:15 AM
  #3  
Senior MemberCaptains Club Member
 
Join Date: Mar 2002
Location: Pensacola, FL
Posts: 5,159
Default

Originally Posted by MVFisherman View Post
Trying to help my friend with his fuel economy problem. He has a Triton 2286, with a verado 250. He’s got a 19P prop and get about 1.2-1.5 when cruising. That seems super low to me. His top end speed and rpm are 5600 @ 40mph.
Any idea on what we should try first?
Does he run around with the engine trimmed all the way in all the time? Apparently some people do...
DreamWeaver21 is offline  
Old 06-13-2019, 10:20 AM
  #4  
Admirals Club Admiral's Club Member
Thread Starter
 
Join Date: Jun 2015
Location: Martha's Vineyard, MA
Posts: 321
Default

Originally Posted by DreamWeaver21 View Post
Does he run around with the engine trimmed all the way in all the time? Apparently some people do...
those numbers are with the engine trimmed up.
MVFisherman is offline  
Old 06-13-2019, 10:20 AM
  #5  
Admirals Club Admiral's Club Member
Thread Starter
 
Join Date: Jun 2015
Location: Martha's Vineyard, MA
Posts: 321
Default

Originally Posted by Onewolf View Post
40MPH seems awfully slow for a 22ft with 250HP. Should be close to 50+ MPH and around 3MPG.

Where is the speed/mpg data coming from?
the verado gauges for the mpg, and gps/gauges for speed.
MVFisherman is offline  
Old 06-13-2019, 10:26 AM
  #6  
Admirals Club Admiral's Club Member
 
Join Date: Mar 2013
Location: Green Bay, WI
Posts: 505
Default

Seems like prop slip is a little high, about 27%. Is there anything that would be disrupting the flow of water to the prop? Maybe a transducer or bracket of some sort?

Last edited by jhackl; 06-13-2019 at 10:56 AM. Reason: Corrected, misread boat model.
jhackl is offline  
Old 06-13-2019, 10:29 AM
  #7  
Senior Member
 
Join Date: Aug 2016
Location: Ohio
Posts: 2,398
Default

is the gauge set for twins or something, that's half what it should be. I think you need to confirm the fuel burn. If that's accurate, something is seriously off.
Lookinup76 is offline  
Old 06-13-2019, 10:31 AM
  #8  
Senior Member
 
Join Date: Aug 2016
Location: Ohio
Posts: 2,398
Default

Originally Posted by jhackl View Post
Seems like prop slip is a little high, about 27%. Is there anything on the middle pontoon that would be disrupting the flow of water to the prop? Maybe a transducer or bracket of some sort?
It's a center console, Triton, not "tritoon"
Dacman and Bront Antwoord like this.
Lookinup76 is offline  
Old 06-13-2019, 10:36 AM
  #9  
Senior MemberCaptains Club Member
 
Join Date: Aug 2002
Location: Baltimore,Maryland
Posts: 5,469
Default

Too low on the top end RPM's and speed.What prop. is it?
Lone Ranger is offline  
Old 06-13-2019, 10:42 AM
  #10  
Admirals Club Admiral's Club Member
 
Join Date: Mar 2013
Location: Green Bay, WI
Posts: 505
Default

Originally Posted by Lookinup76 View Post
It's a center console, Triton, not "tritoon"
Oops, my bad. Still, check to make sure there is nothing like a transducer that is disrupting the water flow to the prop. Still appears to have 27% prop slip. Is the bottom clean?
Lookinup76 likes this.
jhackl is offline  
Old 06-13-2019, 10:44 AM
  #11  
Senior Member
 
Join Date: Aug 2016
Location: Ohio
Posts: 2,398
Default

Originally Posted by jhackl View Post
Oops, my bad. Still, check to make sure there is nothing like a transducer that is disrupting the water flow to the prop. Still appears to have 27% prop slip. Is the bottom clean?
yeah I think prop is definitely first thing to look at.
Lookinup76 is offline  
Old 06-14-2019, 01:34 PM
  #12  
Junior Member
 
Join Date: Feb 2011
Location: Martha's Vineyard
Posts: 3
Default

Thanks for the help, I am the owner. Bottom is clean, except for normal bottom paint. The MPG info is coming from the guage, but it does exactly match the amount of fuel$$$ I am constantly putting in this boat. LOVE the boat!, but the MPG is horrible. Trimmed up, flat water, empty boat, I can barely see 2.2mpg sometimes. It seems I am not the first person to ask this question on THT, others have posted about the bad MPG and wondered why. There is nothing I can discern that would block water flow to the prop, the transducer is off to the side. The high spead water pick-up is a few feet in front of the engine, but I am not sure whether this would matter and I'll have to swim under the boat this weekend to see if it is even lined up with the engine. I wish I could figure this out because I would like to keep this boat, so many nice things about it, but I have been paying the same fuel costs as if I had a 28' boat with twins. My guess is that it is the setup (which is the original factory setup) or the prop. I replaced the '06 250 Verado the boat had with a newer 14 250 Verado on it now. MPG is the same with both engines, so that ruled out something to do with the engines. Thanks
mesaman is offline  
Old 06-14-2019, 02:03 PM
  #13  
Senior MemberCaptains Club MemberPLEDGER
 
Join Date: Apr 2001
Location: East Central Florida
Posts: 5,900
Default

Originally Posted by mesaman View Post
Thanks for the help, I am the owner. Bottom is clean, except for normal bottom paint. The MPG info is coming from the guage, but it does exactly match the amount of fuel$$$ I am constantly putting in this boat. LOVE the boat!, but the MPG is horrible. Trimmed up, flat water, empty boat, I can barely see 2.2mpg sometimes. It seems I am not the first person to ask this question on THT, others have posted about the bad MPG and wondered why. There is nothing I can discern that would block water flow to the prop, the transducer is off to the side. The high spead water pick-up is a few feet in front of the engine, but I am not sure whether this would matter and I'll have to swim under the boat this weekend to see if it is even lined up with the engine. I wish I could figure this out because I would like to keep this boat, so many nice things about it, but I have been paying the same fuel costs as if I had a 28' boat with twins. My guess is that it is the setup (which is the original factory setup) or the prop. I replaced the '06 250 Verado the boat had with a newer 14 250 Verado on it now. MPG is the same with both engines, so that ruled out something to do with the engines. Thanks
Something is seriously F'ed up with your boats setup. If rigged properly and running Ok, the Verado 250 should burn about 12 GPH at 4500 RPM. How does your GPH/RPM match up with this attached performance report?
Attached Images
Onewolf is offline  
Old 06-14-2019, 05:36 PM
  #14  
THT Sponsor Admiral's Club Member
THT sponsor
 
Join Date: Jan 2008
Location: Fire Island NY
Posts: 1,123
Default

Way to much prop slip. I had the same problem on my boat - this year I switched props and my fuel economy almost doubled. are you getting to the recommended max rpm's?
rdiesel01 is offline  
Old 06-14-2019, 06:59 PM
  #15  
Senior MemberCaptains Club Member
 
Join Date: Feb 2003
Location: M.Vineyard, MA
Posts: 14,083
Default

Is the engine mounted too low w/ anti-ventilation plate below the keel plane?
Have you had the prop scanned to confirm it's actual average pitch and overall condition compared to its original spec.?
Are you confident the hull does not have any trapped water that is not being pumped out? Any live well emptied out?

Does it have a (thin-bladed) SS prop for minimum drag?

Has it had better performance in the past?
TTaxi is offline  
Old 06-18-2019, 09:10 AM
  #16  
Junior Member
 
Join Date: Feb 2011
Location: Martha's Vineyard
Posts: 3
Default

THANKS again for all the help. Here are answer to the questions:
-No trapped water, though Triton's are a bit heavier boats than say a Sailfish.
-Same performance since I bought the boat in 2010. Same performance also since replacing the engine with the exact same newer engine (250 verado)
-OEM verado prop, haven't had it scanned.
-I will check the height of the the anti-ventilaton plate when we take it out to test other props this afternoon. Here is my current performance report I created yesterday. The conditions below were flat calm, no wind, one person, 1/2 tank fuel, no gear, a little bit of trim trim tab and trimmed up modestly (except fully trimmed up at WOT).

Last edited by mesaman; 06-18-2019 at 09:14 AM. Reason: spreadsheet didn't past as expected
mesaman is offline  
Old 06-18-2019, 10:36 AM
  #17  
Admirals Club Admiral's Club Member
Thread Starter
 
Join Date: Jun 2015
Location: Martha's Vineyard, MA
Posts: 321
Default

Originally Posted by mesaman View Post
THANKS again for all the help. Here are answer to the questions:
-No trapped water, though Triton's are a bit heavier boats than say a Sailfish.
-Same performance since I bought the boat in 2010. Same performance also since replacing the engine with the exact same newer engine (250 verado)
-OEM verado prop, haven't had it scanned.
-I will check the height of the the anti-ventilaton plate when we take it out to test other props this afternoon. Here is my current performance report I created yesterday. The conditions below were flat calm, no wind, one person, 1/2 tank fuel, no gear, a little bit of trim trim tab and trimmed up modestly (except fully trimmed up at WOT).

MVFisherman is offline  
Old 06-18-2019, 10:51 AM
  #18  
Senior MemberCaptains Club MemberPLEDGER
 
Join Date: Apr 2001
Location: East Central Florida
Posts: 5,900
Default

Have you ever weighed the boat ? Its performance numbers look like it's 4000 lbs heavier than it should be. The fuel consumption at 4500 rpm is a couple GPH high, but the speed is 8-10 mph less than expected.

Lookinup76 likes this.
Onewolf is offline  
Old 06-18-2019, 11:51 AM
  #19  
Senior MemberCaptains Club Member
 
Join Date: May 2005
Location: Seattle, WA
Posts: 7,826
Default

The motor is not running right. It may be missing a cylinder...or two.

If the motor were to reach its 6400 RPM redline, as it should, it would be doing mid-50s

No propeller will fix a motor that is not running properly
Tom W Clark is offline  
Old 06-18-2019, 12:00 PM
  #20  
Senior MemberCaptains Club Member
 
Join Date: May 2005
Location: Seattle, WA
Posts: 7,826
Default

This thread sound familiar?

Triton 2286 CC info needed

If the top speed of 48 MPH is to be believed, then a 19” pitch prop is way too much pitch. Exactly what prop is on there now? (There is no such thing as an OEM Verado prop) How did a 19” pitch prop wind up on this boat?

I’d try the 14-3/4” x 16” Enertia to start
Tom W Clark is offline  

Thread Tools
Search this Thread