IP,s are adjusted by drip timing and not by pool timing.
You need a reservoir and a drip pipe to do this job.
Conneced the reservoir to the fuel inlet on the IP, and the drip pipe to the first cylinder outlet, after you remove the spring and the plunger.
Set the engine to about 35 gegree before igniton TDC and fill the reservoir with diesel.
After the air bleeds out you will see a stream of diesel coming out of the drip pipe.
Now turn the engine to 24 degree.
You should see one drop every 1 to 3 seconds.

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76 240 D. Bought in 1998 for $25.
85 300D. Got it for free with a bad engine. ( Sold )
60 Unimog 404. What was left of it, was given to me. Now powerd by 617A.
88 560 SEL. Bought without engine and trans. Now powerd by 617A.
67 250 SE. Cuope. For resto or sale.
64 220SE. For resto.