Max Cruising RPMs for Yanmar
I have a 1988 Morgan Classic 41 with an original Yanmar 4JHBE with 2,440 hours. It is in excellent condition, rigorously maintained and with no problems whatsoever. The rated horsepower is 44 @ 3600 rpm. Are there any opinions on a safe, long-range maximum cruising rpm for this engine? My S.O. insists I not exceed 2700 rpm and I can't see crossing the Gulf Stream from Miami to Cat Cay at a VMG of 2 knots if we have to motor. Thoughts appreciated.