It's leaking out the little drain tube on the bottom side of the pump. I've been warned to not plug it by Iowa Injection, as the pump is designed to leak out the bottom. Maybe leak isn't the right word, but the pump is designed to discharge some fuel. Iowa says 12 drops per minute is OK, but higher is not so good.
By the way Dan, I'm getting close to selling that (I've been told) NOS hydraulic pump. You said you might be interested. A little story: I had the engine rebuilt, and when I tried to install the NOS pump, it wouldn't bolt up. So, I tried the old pump -- same story. Very long story short -- the engine mounting plate had been "tweeked" so that the captive nuts in the plate, the bolt holes in the timing cover, and the large hole that the boss of the pump fits in were off enough to prevent installation. SO, I took the old pump, filed off a little on the top of the boss, and it bolted up. I have good pressure, plenty of gear clearance, so no problem. Just didn't want to ruin the NOS pump by filling on it.
That NOS pump has those little paper plugs in the ports, and it must have very good pressure, because when I turned the drive about 1/4 turn, one of the plugs shot out with a nice "pop." I am pretty sure it is a new pump.
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