I have towed many skis through rough water with a 1/4" nylon rope. In smooth water the strength needs to be only slightly greater than the thrust of the tow ski. Rough water greatly increases the peak load. Nylon will stretch enough to smooth out the shock loads if the rope is long enough.
Just replace the 91-100k resistor with a 70-75k and seal up the box. This will get the rev limit up to 7300-7500. Lower resistance raises rpm. Why would you want to eliminate the rev limiter on a watercraft?
Dont get a big bore if you plan on running full speed on pump gas. Big bores are for throttle response, and something to brag about. A ported 62T cyl at 82-83mm will make all the reliable power you can get on pump gas.
There was a major recall on the early 701 Wetjets. The kit had half of the parts needed to make a ski. New steering head, pump, seat pan, etc. 96+ models had all the updates. They were good performing boats with lots of maintenance issues.
Everything we have is designed as a bolt-on part for racers. We are just now getting larger, low RPM engines but are still using existing pumps/inlets. There is not much enthusiasm or money flow going into anything but big carbs, big engines, and carbon fiber. Dont expect much new development...
My only experience with a Mag pump showed exeptional piriming, I didnt do any work with with it. Nobody is posting much top speed gain with Mag pumps so their pressure potiential over stock must be minimal.
Your 62T cone at 85.5 is about as good as it gets as long as the prop load matches the engine. Anyone getting more/less thrust by changing the pump is just finding tune with the engine and not actually making the pump any better.
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