The leakage was estimated at 1 gallon for every 100 miles run or about 2 gals a day, in warm water and about 1/10 of that in cold water. In order to find the leak I put paper towels and bilge pads in likely and unlikely places under and around fittings and could never find a trace of a leak.

The speed of a displacement type hull is limited by its waterline length and there's a well-known rule-of-thumb for estimating maximum displacement speed, or "hull speed" which is approximately 1.34 times the square root of the water line length.

Saving tracks, estimating fuel and travel time, evaluating alternative routes, knowing what ports and services are available in other locations have been tasks that are made much simpler by using Nobeltec.

This simply estimates the resistance of a hull to capsize when hit on the beam by a sudden transient force like a wave or wind gust. The capsize number is simply the boat's overall beam divided by the cube root of the displacement volume in cubic feet.

Using this constant, power requirements (and fuel consumption) can then be estimated for that same hull for a range of speeds and displacements. You can generalize to other boats of the same general type with less accurate results. It would not do, however, to use Keith's formula to compare displacement, semi-displacement, and planing boats.

to make a long story short, after talking to two separate dealers, who contacted their distributors and ultimately Cruiseair up in Dania, FL it was learned that a replacement pump would cost $730.00 + shipping, BUT even Cruiseair did not have one in stock and they estimated 10 days to 2 weeks to acquire one. Unbelievable?

For either engine, fuel burn is a general measure (and a good one) for rebuild estimates. It is better than just engine hours because fuel burn reflects not only run time but HP (RPM) developed. So an engine run at near WOT will burn a lot more fuel than one cruised at,say, 70% WOT.

Perhaps the broker was already discounting this > in his estimation. > > Bottom line is I want to give a fair price but leave as little money on > the table as possible. What effect does lowballing have on negoitiations? > Is > it off putting?

Got hold of Triple M Plastics in Maine, a small firm that builds tanks for fire trucks, pest control companies and so forth: http://www.triplemplastics.net/ They estimated they could weld up the tank to my exact spec. out of 3/8 polypropylene for $220.00. That would include any number of reinforced, threaded holes for fittings.

Using this constant, power requirements (and fuel consumption) can then be estimated for that same hull for a range of speeds and displacements. You can generalize to other boats of the same general type with less accurate results. It would not do, however, to use Keith's formula to compare displacement, semi-displacement, and planing boats.