Trap Jaw
Posts: 155
Joined: 12/22/2005 Status: offline
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It all depends on how old the motor is and when the last time you had it "tuned up", that involves changing plugs, checking points (if it has them), and rebuilding the carb. You can try running better oils, but on my old Merc's it doesn't matter what kind of oil I use, they were built on 37 year old technology, they just smoke. The one thing you should do before you start for the day and after you are done trolling is to run the motor at wide open throtle for a few minutes, IN GEAR. I will typically make a 5 minute run before and after. That will help to "blow out" all the crap that builds up. Another thing to keep in mind... What is less expensive, fouling out your plugs and replacing them more offten or running the motor leaner and ruining bearings, pistons or cylinders? As a side note, I have heard a lot of guys, not on here, complaining about their motors loading up, stalling out and generally acting up while trolling. The one thing that you have to remember is that no motor on this earth, aside for electrics and the new bigfoot motors, was designed to run for hours on end at very low speeds. Doesn't matter what motor you are talking about, even 3-4 horse, they were designed to go on an apropriate sized boat and run as high an RPM as possible that produces the best horse power. So no matter what size motor you are using as a trolling motor it will always have problems unless you are running it at the higher end of it's RPM range(half throtle or better). I got rid of the 9.8 Merc on my boat last summer after it gave me nothing but headaches and replaced it with a 4HP Merc. I will never look back. Yes, I have to run the smaller motor at a higher speed, but it uses less gas and smokes less, because it is running more efficiently.
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Remember, shoot straight and shoot often.
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