Notices

Mako 18LTS Fuel Guage Problem

Old 07-14-2015, 03:18 AM
  #1  
Junior Member
Thread Starter
 
Join Date: Jul 2015
Posts: 3
Default Mako 18LTS Fuel Guage Problem

I have a 2014 Mako 18LTS and the fuel gauge never drops below 1/2. I put in 24 gallons the other day (28 gallon tank) and the gauge was reading above 1/2 full before fueling up. The dealer checked the sender in the tank and says it is ok and could not offer a solution tried to tell me thats the way they are (mental note do not go back to this guy) . Since I dont see other Mako 18 owners complaining I'm betting that this aint so. Any other 18LTS owners been down this path?
OldMakoMan is offline  
Old 07-14-2015, 07:03 AM
  #2  
Senior Member
THT sponsor
 
Join Date: Jan 2013
Location: Sarasota/ Bradenton fl
Posts: 3,314
Default

Doubt it has anything to do with being a mako. Is it a smartcraft gauge or traditional gauge?
Dockholiday74 is offline  
Old 07-14-2015, 07:21 AM
  #3  
Junior Member
Thread Starter
 
Join Date: Jul 2015
Posts: 3
Default

Not sure what a smart craft gauge looks like (digital ?) ... this appears to be a traditional electrical analog dial gauge. ( sender on top of the tank ....little round gauge up on the console). by the way I checked with the gunnels "level" in the driveway, so this is not a bow tilt problem. I suspect a bad sender in the tank but dealer ( who I do not trust for a number of reasons) says the sender is ok. It has been this way since I bought the boat new 11 months ago. Just got around to having the dealer look at it ( because of the distance from me to the dealer)
OldMakoMan is offline  
Old 07-14-2015, 07:44 AM
  #4  
Senior Member
 
Join Date: Mar 2014
Location: Miami
Posts: 713
Default

My 17' Key West does something similar. The tank is full and the guage reflects that. It takes a long time for the first few bars to disappear off the guage. Once I burn some decent amount of fuel, it seems to work fine. I attribute that to the tank being shallow and bow rise. Just because your gunnels are level doesnt mean your deck or tank is.
El Faster is offline  
Old 07-14-2015, 08:03 AM
  #5  
Junior Member
Thread Starter
 
Join Date: Jul 2015
Posts: 3
Default

Let me state it another way ...with only 4 gallons left in 28 gallon tank it reads halfway between 1/2 full and 3/4 full .. with only 4 gallons left in tank should be closer to less than 1/4 8^(
OldMakoMan is offline  
Old 07-14-2015, 09:01 AM
  #6  
Senior Member
 
Join Date: Mar 2014
Location: Miami
Posts: 713
Default

Perhaps you need a new sender. I have read many times on this forum that you should never trust your guage anyways. Figure your fuel burn and use that based on how far youve travelled. My tank is always full so I dont really worry too much about that.
El Faster is offline  
Old 07-14-2015, 09:18 AM
  #7  
Junior Member
 
Join Date: Jun 2015
Location: Slidell, La.
Posts: 15
Default

It sounds like you have a problem to me. I have a brand new 2015 Tidewater baymax 1900 and when i fill it to the max my gauge reads between 3/4 and full. I could complain about this to the dealer, but since it's not off by much and i have more fuel than it says no issue. Your issue is not the same and i think you need to find another service center to take it to. Maybe call the manufacturer and ask them if this is normal. Ask them if there is a different service center you can take the boat to for repairs.
bboudreaux1969 is offline  
Old 07-14-2015, 09:31 AM
  #8  
Senior Member
THT sponsor
 
Join Date: Jan 2013
Location: Sarasota/ Bradenton fl
Posts: 3,314
Default

What kind of motor is it? The reason I ask is most Makos are rigged with Mercs. Typically these motors of that vintage will have Smartcraft gauges and all you would need to do is calibrate gauge. Gauge would typically say Mercury or Smartcraft on it. Back of gauge would have a harness.
Dockholiday74 is offline  
Old 04-28-2019, 07:04 PM
  #9  
Senior Member
 
Join Date: May 2016
Posts: 192
Default

I have noticed my new Mako 18 LTS the fuel gage most of the time reads full, even after consuming half a tank of fuel.
What I found is the fuel gage is located all the way to the back of the tank. The tank is a shallow tank, which compounds what I feel is a design flaw (bad location for the sending unit). Why? Since the boat in the water sits bow high and stern low, the fuel moves to the back of the tank where the sending unit is located. This causes the float of the sending unit to rise and indicate a full tank on the fuel gage. Had the design incorporated the sending unit’s location at the middle of the tank and not all the way to the back of the tank, the fuel gauge would read a truer fuel level of the tank.
Try leveling your boat, when checking the fuel level.
Cobia206 is offline  

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are Off


Thread Tools
Search this Thread