Joe, I like the remote fuel pressure gauge! That looks like aviation or race car technology. Tom is trying to find out why he can’t get that last 15 gallons of fuel. I believe Josh has the same Yanmar and believe he posted his vacuum numbers so there is something to compare to. He can also shut off the fuel valve when running the engine and get a sense of what vacuum the fuel pump is drawing. If it won’t hold vacuum maybe there is an air leak somewhere. If the pump won’t make 1 inch of mercury he knows it’s probably a pump problem. That’s all I was trying to suggest before he gets into a new pump. And as a bonus for around 20$ he will also have a primary fuel filter monitor. Len
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