Diesel electric fuel pump
I have a question for someone more knowledgeable then I.
I have a 32' steel hull trawler with a Perkins 4.270 4 cylinder (60hp) diesel engine (mid to late 50's) with a 12volt electric fuel lift pump between the fuel/water filter and the engine. Over the past two weekends, I have gotten more than proficient at bleeding the engine having it die 6 times on me while underway due to lack of fuel. I thought that I was getting air in the line as I had only put fuel in the port tank and shut the valves off on the starboard tank. Well after putting fuel in the starboard tank, opening the valves to both tanks and putting a second hose clamp on every rubber hose connection, I still had it die on me this past weekend requiring bleeding. When it died this weekend, I actually paid attention and found that the fuel pump wasn't running when it died.
So I now realize that it is the fuel pump that has gone south. Here in lies the problem. Original electric pump is a Stewart Warner 82055 which is rated at 7.5psi @ 65gph. After going to every marina and part store within a 50km radius, the only pump that I could come up with for less than $500 was one that is 6-9psi @ 35gph.
The question that I have is, will this pump suffice for my needs, or am I shooting myself in the foot putting the smaller pump in place. I burn about a gallon an hour at cruise (1500rpm @ 6.2knots) so in my mind 35gph should be enough to run the engine. HOWEVER, I know my way around gas engines, but this is a new adventure owning a boat now with a diesel engine in it.
Any guidance would be more than appreciated.