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Re: Full throttle needed to start Yanmar 2GM20F
That's been my experience.
On our last rebuild I ordered a full set of 'reconditioned' injectors. During the break-in period we got some fuel knock that scared the H out of me because it sounded like metal-to-metal contact.. gladly discovered eventually that one of the 'new' injectors was breaking over at under 500 psi = wet fuel = serious knock. Replaced injector and off to the races.
That is exactly what my knock sounds like right now.
You and a number of other people are saying the same thing about rebuilt injectors. Surprising that anyone even bothers with them.