I am asking this question primarily for the h40.5 model but Hunter may have had a common practice for all their boats that applies.
My OEM tank was manufactured by Ezell and it had both engine and generator supply and return connections as delivered. I added a generator and used the previously unused generator connections.
Somewhere I heard that the pickup tubes for the engine and generator were cut to different lengths. The generator pickup is higher in the tank than the engine pickup so that if the generator runs out of fuel the engine can still draw fuel to travel some limited distance to a fuel dock.
This makes sense to me.
But last summer I managed to run the generator out of fuel for the first time ever. I did run the engine for short periods of time for a couple days to make hot water and charge batteries while I was waiting out some nasty conditions at anchor.
Upon motoring to the fuel dock that was about 3/4 mile away, I ran completely out of fuel. I was towed to the dock and took on 33.5 gallons to full. The tank is a 40 gallon tank and I have verified this volume by dimensional measurements and calculations.
I should add that according to my engine and generator hours, the auxiliary ran for 20 hours (0.7 gph) and the generator ran 30 hours (0.4 gph). I should have only used about 26 gallons of fuel total, much less than the 33.5 I took on.
So I am wondering if the two pickups are really at different depths and what those depths actually are. It seems like I should be able to draw more fuel than just 33.5 gallons out of a 40 gallon tank, but maybe that pickup is not at all near the bottom.
So does anyone have actual measurements of the depth of the pickups? How much higher is the generator pickup than the engine pickup? I suppose I can pull out both of my pickups, but the access is under battery boxes and this job would take me a good half day. More if something goes wrong. (Like that hardly ever happens....)
My OEM tank was manufactured by Ezell and it had both engine and generator supply and return connections as delivered. I added a generator and used the previously unused generator connections.
Somewhere I heard that the pickup tubes for the engine and generator were cut to different lengths. The generator pickup is higher in the tank than the engine pickup so that if the generator runs out of fuel the engine can still draw fuel to travel some limited distance to a fuel dock.
This makes sense to me.
But last summer I managed to run the generator out of fuel for the first time ever. I did run the engine for short periods of time for a couple days to make hot water and charge batteries while I was waiting out some nasty conditions at anchor.
Upon motoring to the fuel dock that was about 3/4 mile away, I ran completely out of fuel. I was towed to the dock and took on 33.5 gallons to full. The tank is a 40 gallon tank and I have verified this volume by dimensional measurements and calculations.
I should add that according to my engine and generator hours, the auxiliary ran for 20 hours (0.7 gph) and the generator ran 30 hours (0.4 gph). I should have only used about 26 gallons of fuel total, much less than the 33.5 I took on.
So I am wondering if the two pickups are really at different depths and what those depths actually are. It seems like I should be able to draw more fuel than just 33.5 gallons out of a 40 gallon tank, but maybe that pickup is not at all near the bottom.
So does anyone have actual measurements of the depth of the pickups? How much higher is the generator pickup than the engine pickup? I suppose I can pull out both of my pickups, but the access is under battery boxes and this job would take me a good half day. More if something goes wrong. (Like that hardly ever happens....)
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