Re: 2000 2 stroke mercury
engine starts fine but once into high speed after a while randomly the engine wants to die but recovers. (loss of power)
i have replaced the line from tank to motor and seemed to slightly resolve it however i still cannot get the primer ball to become hard enough for pressure?
It does fill up the reserve chamber in the motor.
Wondering if it is the fuel pump leaking?
Motor runs fine in idle
i don't want to paddle if necessary lol
you didn't mention the size of your engine, is it a efi or optimax???
The following is my personal opinion from running mercury outboards for 50 yrs
good start with replacing the fuel line, however with the ethanol fuel we are being forced to use, make sure you used a ethanol approved fuel line or your troubles are just beginning.
Replacing the squeeze bulb is a good idea if its not holding pressure, check valves inside can good bad and ethanol fuel are breaking down the inside of bulbs and hoses,(never use a aftermarket bulb and hoses, get it from your dealer.)
mercury makes three fuel/injector cleaner, they are numbered, use #2.
Mercury fuel pumps sometimes cause problems when they sit (not being run) so if you don't run your motor very often try the #2 in your fuel for a couple of tank fulls
you mentioned that it seemed to be better with the new fuel line. The old hose and current bulb may be slowly depositing debris to your motor, look inside your old hose to see if the interwall is damaged or wrinkled up. Change your bulb, put a new fuel filter on (if it has one).
Spark plugs that are starting to foul out can make it act this way, so change them. These are things the dealer is going to do anyway in trouble shooting your motor. If after all of this and you still go to the dealer, make sure you tell him what you have replaced so he doesn't do it again.
Put the ejector cleaner #2 in your fuel and run thru a couple tanks full before you go to a 80 dollar per hour authorized dealer. The above are some of the cheapest things you can do to try and do it yourself. There are other things that can cause these same symtoms, but behond the above, its going to get pretty techical and more complicated like checking reed valves, fuel pump pressures, firing systems or timing, etc. Don't burn ethanol fuel in your outboard if you can help it or any of small engines, even if it is higher in price, it will save you money in the long run. Your car or truck can handle it but not 2-cycle engines...mechanics are getting rich off the 2-cycle owners. If you have a carburated motor burn the fuel out of the carb, ever trip, before you pull it out of the water. Even if your going to use it the next weekend, that tip is big, do it without fail. Fuel injection motors is not necessary.
