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Old 08-14-2012, 01:08 PM   #14
Nomad Willy
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City: Concrete Washington State
Vessel Name: Willy
Vessel Model: Willard Nomad 30'
Join Date: Oct 2007
Posts: 18,738
High idle is usually several hundred rpm above power rated rpm. Probably around 2700 for the Ford Lehman.
I run my Mitsu at WOT in gear 5 or 10 times a year. It tells many things. Most importantly it tells if you're propped correctly. WOT should produce the rated rpm as in 2500 for the Lehman's. One should run WOT for 2 or 3 minutes to test the fuel system for it's ability to deliver fuel. With my old Perkins we boated around in the San Juan Is for awhile thinking our Perky ran just fine. In the Swininomish Channel I ran it at WOT for about 2 minutes and the engine abruptly quit. Never would have known if I hadn't gone WOT. Rpm hunting, smoking or other irregularities will tell how your engine is running and there's no better way to find out. Don't do it in bad place like I did though.
Marin what do you think is going to break or get damaged when you run WOT?
Or when you cruise at 2100 rpm?
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