Sea Trial

[Dreamboat]

Has anybody ever heard of a surveyor asking to run the boat at WOT for half an hour during a sea trial?

[madhatter1]

No, just a few minutes to check RPM and temps. I would never run wide open for 30 minutes.

[rsmith]

Back in the day everyone ran Detroits on the pins. I’ve had mine on the pins for 3-4 hours coming home from the canyons to make a tournament weigh in. IMHO this hull speed crap causes more engine damage than running them hard and keeping them clean of soot. In reality the Detroit ops manual calls for advancing the throttles to full rpm then reducing 200 rpm for cruise. In reality what’s another 200 rpm on a heavy overbuilt Diesel engine?

[Scarlett]

As a surveyor I have had clients insist on running WOT for. Long period and have had them actually get in fights with owners who did not want to. Had one Hino diesel overheat after about 20 min on the pins and blew 2 hoses on a pair of Cummins. Most mechanics I work with only want to see WOT for about 5 minutes

[Pascal]

I ve never seen it done for that long either. 2 to 3 minutes to verify RPM and temps.

Last survey i was involved with was the sale of the 84 Lazzara I ran for a few years. After all the usual the surveyor asked me to come to idle and then apply full power (1650hp C32s) to accelerate the boat again to WOT. I refused. I turned to the buyer and explain to him he didn’t want me to put that much stress on the drivetrain. He agreed. I did it by gradually going to WOT over a period of about 5 seconds. Surveyor wasn’t happy but the buyer was

[cww]

I ve never seen it done for that long either. 2 to 3 minutes to verify RPM and temps.

Last survey i was involved with was the sale of the 84 Lazzara I ran for a few years. After all the usual the surveyor asked me to come to idle and then apply full power (1650hp C32s) to accelerate the boat again to WOT. I refused. I turned to the buyer and explain to him he didn’t want me to put that much stress on the drivetrain. He agreed. I did it by gradually going to WOT over a period of about 5 seconds. Surveyor wasn’t happy but the buyer was

That's nuts was the surveyor going to open his own wallet up if it broke a shaft?

[SEVEN]

All of my purchases have been 5 min at 1500, 5 min at 2000 and 5 min at WOT.

[Avenger]

RTFM

As usual, there is a difference between commercial and pleasurecraft ratings, and the manufacturer will specify how many minutes out of an hour are permissible within the context of that rating.

Do that. I don't understand the fear people have of WOT. The engine is made to do it, and if everyone is afraid of it when you're buying the boat something is wrong. And if you break a shaft going to WOT something is seriously wrong.

Why wouldn't you want to test the performance limits of a boat you are paying a lot of money for?

Some people seem to think these things are made of Corinthian leather instead of iron and steel.

[jap201]

agree 100%. the only change I'd make to your comment is switch "Corinthian leather" with "fine china".

RTFM

As usual, there is a difference between commercial and pleasurecraft ratings, and the manufacturer will specify how many minutes out of an hour are permissible within the context of that rating.

Do that. I don't understand the fear people have of WOT. The engine is made to do it, and if everyone is afraid of it when you're buying the boat something is wrong. And if you break a shaft going to WOT something is seriously wrong.

Why wouldn't you want to test the performance limits of a boat you are paying a lot of money for?

Some people seem to think these things are made of Corinthian leather instead of iron and steel.

[SKYCHENEY]

We ran DD's for years in trucks and heavy equipment. Our main mechanic wanted to see them run at full throttle and this is guy who had to rebuild them. I wouldn't be afraid to run them up. If your cooling system is functioning properly, there is no issue.