Having trouble with depth sounder and knot-o-meter on my 1981 Hunter 33. Unable to locate S R Instruments on web. Looking for owners manual and/or service manuals. (Model KL DDM-1 Knot meter)
Norm try here: http://www.srinstruments.com/Mariner/default.asp P.S. I have a question for you, what is the maximum RPM you can get under power? I'm assuming you have a Yanmar 2GM and a two blade prop.
We have had the boat only a year and most of the summer we have not been able to use it. Previous owner used boat as a summer cottage @ Cedar Point and left the dock only once or twice a year. Because of the age of the engine I don't push it. Running about 2100 rpm That will get me about 5.5 mph on GPS (knot meter not working). Motorsailing at 2100 on a close reach and a 10 knot breeze we saw 7.3 on the GPS last weekend. I have ran it up to close to 3000 rpm only momentarily. Not much help I'm afraid.
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