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2 stroke Mercury 60 problems
Posted on 7/21/17 at 3:31 pm
Posted on 7/21/17 at 3:31 pm
I have a 2003 Mercury 60. It will run fine out of the water with ear muffs on it. When I try to run it in the water though, it will bog down big time at full throttle. Can't get over 8 mph. Noticed today though that if I trim it all the way up so that it is barely in the water it will run like a top. As soon as it gets further down in water it will start surging and eventually bog down. Any idea what the problem could be? Drained all of the gas out and put fresh non-ethanol gas in it today, so I don't think that is the problem.
Posted on 7/21/17 at 3:36 pm to RoosterCogburn585
If it is a carb motor have them cleaned out/rebuilt. If efi take it to someone that knows them. What gas are you running? I only run premix non-ethanol. Don't trust any of the factory oil mix equiptment to work right. When they start acting up they either add too much or too little oil.
This post was edited on 7/21/17 at 3:48 pm
Posted on 7/21/17 at 9:01 pm to RoosterCogburn585
quote:
2 stroke Mercury 60 problems
I have never been on a boat with a Mercury outboard engine that did not give a problem. Never. At least 5 out of 5 problems.
Posted on 7/27/17 at 2:58 pm to RoosterCogburn585
I have a 60 HP 4 stroke at the lake house that lost all fuel pressure and bogged down to about the same speed. Figured fuel line was bad because bulb wouldn't get hard. replaced the fuel line. Now it is trying to turn over but won't even fricking start. Pulled filter out yesterday and it has water in the gas. Going to try and flush it out today. I'm filling it with tannerite if it won't start
Posted on 7/28/17 at 12:46 am to RoosterCogburn585
quote:
Mercury
I found your problem
Posted on 7/29/17 at 5:24 am to RoosterCogburn585
My 2004 90 Johnson just did something similar. Wouldn't go over 2000 rpm while in the water. Took it to the shop and they cleaned the carbs which had a lot of trash in them. After test running for 10-15 minutes it did the same thing. Ended up changing the fuel lines in the motor b/c they had deteriorated. Took it out last weekend and it ran like new. I had also replaced the fuel line from the tank to the bulb and added an inline filter. I've read online while trying to figure out the problem that it's best to replace the fuel lines on any motor older than 2008 or so. I don't run ethanol gas in it but the previous owner must have.
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