Red,
I have a 70 hp 4-stroke Johnson (really a Suzuki) on a 1675 Lund Explorer tiller (all 2003). The 60 hp and 70 hp have the same displacement and weight – so they must be very similar. I bought it because I wanted a 4-stroke with fuel injection (I did not want carburetors for the type of fishing I do). At first I was concerned about the weight but this Explorer has a 90-inch beam, which easily handles the motor weight, plus I also put both my batteries in the front part of the boat for better balance.
I do not back troll so I will not be putting on splashguards, nor will I need a kicker. I find that if I put a couple 2 gallon feed buckets off the sides, I can slow troll forward at the right speed (almost at a stop — depends on the strength of the current) when pulling floaters upstream. For typical long line, or lead line trolling no buckets are needed.
I retired this year and have already put many hours on the motor since August. It starts instantly no matter how hot or cold it is and always runs like a watch. In fact, I have purposely tried to make it kill, stumble, or surge – so far, no matter what I do to it; I cannot even make it burp. The most common thing my partners ask me when we are trolling is “Is it running?” — it is very quiet, smooth and smoke free.
For top speed I have gotten to the low 40s by myself with the live wells empty and little gas in the tank. When adding another person and more gas, then I get into the mid 30’s. When I put up my homemade portable 5’ wide by 4’ high windshield and two people, I only get 30 mph.
This particular motor has been in production about 5 years now as is also used in Suzuki automobiles – so I am hoping it will be reliable. There are a lot of moving parts in the motor compared to the simple 2-stroke on my last boat, so I am keeping my fingers crossed that it will last me a long time.
From my limited experience I think it will be a good motor. It has proven to be substantially better than my previous motor but technology has improved so much that probably any new motor would be a vast improvement.
Down side – I think they charge way too much money for the motor. Of course all the new motors are outrageously priced.
Dave Gulczinski