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Your oil pressure is fine. MANY of them run at about 25 psi. once they are hot. I think the oil pressure shut off is set at about 18 psi. So 25 when hot and under load is considered pretty normal.

Yes, with the IP in place, rubber fuel line attached and injector line disconnected or loose ( loose may help induce more of a spray than a dribble with no line attached ) you should get a very small spurt of fuel out of each IP. However.... 2 things. Don't use the dead crank switch, that won't...

Interesting, thought for sure you would have found a stuck metering pump. The pump drives off a cam follower and a little inverted cup. While the pump is out I would put something down the hole and sit it in the cup. Crank the motor by hand or with the dead crank switch and verify you have...

I'm thinking you have an issue with cyl.3. The 15* temp difference is excessive, not to mention that the heat is very much transmitted just through the steel itself, meaning that you could have a totally DEAD cylinder and the temp difference won't be night and day with a working cylinder, if you...

I agree with everyone above. Start by running if for a while with seafoam, ATF or other cleaner in the fuel, and gradually stepping up the load every 20 minutes or so until you get as high as you can go without it struggling bogging and smoking. Then remove the load, set frequency to 61.5 and...