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MEP 802a No Fuel Indicator
- Thread starter Knuckles
- Start date
Yes, a somewhat common problem. There's several threads discussing this on this forum.
Usually comes down to either the lower float of the dual float switch in the tank or an issue with the float module mounted inside the tank area on the right, small metal box bolted to the right side.
Check through the fuel filler and make sure the lower float is moving freely and not stuck or rubbing against the side of the tank.
If its free and floating, next thing is to use a DMM to check if the float switch is operating correctly. if it is, lastly check the float module.
If it's touching the side of the tank, the Z-shaped arm can easily be rotated away from the side wall of the tank.
If I recall correctly, unplugging the white rectangular connector on the back of the fault indicator will allow you to run in an emergency.... without any safety's working.
Usually comes down to either the lower float of the dual float switch in the tank or an issue with the float module mounted inside the tank area on the right, small metal box bolted to the right side.
Check through the fuel filler and make sure the lower float is moving freely and not stuck or rubbing against the side of the tank.
If its free and floating, next thing is to use a DMM to check if the float switch is operating correctly. if it is, lastly check the float module.
If it's touching the side of the tank, the Z-shaped arm can easily be rotated away from the side wall of the tank.
If I recall correctly, unplugging the white rectangular connector on the back of the fault indicator will allow you to run in an emergency.... without any safety's working.
Look at the "bad" one. Sometimes you find a wire loose or broken. The float has three magnets in it to open and close the contacts in the tube. I have often found that the float was stuck, not travel on the tube. Or, due to JP8 usage, the floats had been turned to dust, or that the magnets fell out. Before you toss the float, at least test it. If the floats are not damaged, and its only the contacts, safe the floats. I have made one out of two float switches, several times.
MrShawn305
Active member
I'm about to do this SAME repair today lol.
Excellent idea! I'll save mine and do a failure analysis on it. Save it if I can
Its not the most robust part, but thankfully still readily available when needed.
I checked out my “bad” duel float and indeed it’s not bad. I just picked up another 802a last week and it had the same issue. Both are tier 2 resets that never saw use. Both sitting at 2.2 hours which was what they were at after the reset. This time I took off the panel and loosened the nut on the float. I took a very technical approach and shook the crap out it - up and down and side to side. I reset the depth as close as I could to the TM recommendation and fired it up. Problem solved. Not sure if it was rubbing on the side of the tank or something like that, but it’s fine now. An easy 15 minute fix that cost nothing.