Engine survey, 6-71's TI in good condition.

OK, next step the mechanic want to run at wot for 10 minutes to check all temps , engine power output and any other issues that may come during that event. airbox inspection indicates approx 40% wear , no scoring all rings good.
I was a bit taken back as I was under the impression that in pleasure craft with recreational use that a max of 2-3 minutes was the acceptable time for that run up. High idle was fine, ran up and held at 2200 with no issuesm may need a rack adjustment after load test.
any comments appreciated.

Helping a friend on purchase of these 6-71's, the high idle was close to 2200 I noticed on the guys tack was a look before going down to 600 low idle so I may be mistaken , all to be reconfirmed after we have done sea trial and load test , one turbo was not fully free turning and would bind ever so slightly, mech. would not accept responsibility for any sea trial WOT issues after finding that. so turbo in the dr's office getting overhauled. we have no confirmed background on previous readings of rpm's under load , hopefully next week we do that, we ran up my 12-71's after rebuild to 2100 pinned as we had downsized the injectors a few years earlier, if memory is correct about 5 mins was the timing on those runups. after shut down we discovered a stuck injector, luckily in the no fuel position, fixed that and re test all good.

Good point, Tks.

Probably easiest way is to go back to N70 injectors, the 65's where put in many yrs ago as a recommendation from a DD mechanic, no suggestions to recut props or otherwise, am now in contact with dealer for explanation of lower wot rpm and not advising of potential issues..at that time I was a true diesel novice, still am in actuality. again, thanks for the great feedback.