Guys, let's face it. With a 25 year old engine where is the reliability? Rebuilt or not, it's still 25 year old technology. Do I remove the oil pump and pre mix or not? If you troll alot, you'll get tired of fouled plugs. Most manufacturers don't support parts for 25 yr old motors. I personally run a 150 hp Yamaha four stroke on a boat that dresses out at over 4500 lbs. (w/o 5 fishermen onboard). I get 4 mpg with a top speed of 38 mph. It has just under 1000 hrs on it and it's had nothing but normal maintenance. In my business, if I don't go, I don't get paid. I'm on the water over 150 days a year. Loopers, carbs, premix etc. I like words like four stroke, fuel injection, smokeless, quiet, good fuel economy and current technology. It's personal preference and just my $.02. This post has nothing to do with two vs four stroke motors, but reliability. My vote would be for a newer engine, but not a new one unless you plan to keep the boat for several years.
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