My new bride is Italian and she keeps me mixed up all the time!
Yes, I’m sure Fuel Injector Man is in Naples, not Venice. How fortunate that he’s right there in your backyard! I’ve spoken to him and he seems very knowledgeable. He used to be a devoted Merc/Yamaha fan, but said the E-TEC injectors produce the most beautiful spray pattern he’s ever seen and that made him an instant convert! He was so impressed with the design of the injectors and of the overall engine that he put a 175 E-TEC on his personal boat when his old Merc died.
In a 2-stroke motor, the vertical location and dimensions of the intake and exhaust ports, relative to the piston, determine the timing of the intake and exhaust events, much like the camshaft determines valve opening timing, duration and overlap in a 4-stroke. Even though the basic block dimensions are identical on all the 2.7L motors, it’s possible there are some subtle differences in the port machining between the 135 and 200. On any naturally aspirated engine, the hp/cubic inch ratio is often a good indicator of an engines temperament, i.e., low numbers = smooth idle, good low end torque; high numbers = rough idle and weak low speed torque but lots of power at high rpm. Boat surveyor Dave Pascoe said to beware of heavily turbocharged diesel engines that produce more than 1 HP/cu. in., as their durability is often no better than gas engines! The old marinized Perkins tractor engines in my trawler only make 135 hp @ 2800 rpm from 354 cubic inches, but they’re turning big 4B 27x21P props and will really make this 30 ton boat jump if you goose the throttle at idle! Very handy in close quarters maneuvering! They will easily push the boat to hull speed at about 1800 rpm, burning only ~ 2 gph each at ~ 8 kts.
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