mercury 6 inline

[brokensword]

Okay so I just changed the carbs and fuel pump on my 90hp blueband because the engine was difficult to start, dripped fuel from 2 carbs when I did manage to start and would not provide any sort of power.

A marine mechanic recently told me that the problem was the reed valves, probably on the bottom carb as the top tow "looked okay" Do you think this is correct?

So far, after changing the carbs and fuel pump around I have only been able to start the engine once, after great difficulty. The engine seemed to be unable to keep a constant idle speed. This could just be that the carbs are not set up correctly right?

Also, I know that the reed valves are inside the engine, but are they difficult to change?

Sorry about all of the questions, I am new to this and struggling with this

 

[Texasmark]

Re: mercury 6 inline

Reed valves are directly behind the carbs and their job is to open and let fuel/air mix in when the engine is in the upstroke (vacuum) and close as soon as it starts the power stroke (pressure pulse). They are just like the valves in a car in terms of function and just important.

I never had a reed valve problem, but I have seen comments where they break off, or become worn and don't seal like they are supposed to. I can't advise you on whether or not your are bad. Look up the subject in the Archives for help.

Mark

 

[194269]

Re: mercury 6 inline

If the reeds were bad, (meaning not seating right) you would see fuel being blown back out the carbs. If any of the reeds were missing, I dout if the engine would even run. Start with putting kits into the carbs and fuel pumps, and check the floats to see if they are set right. I agree with texasmark, I have never seen a reed valve problem with the inline Mercs.