Problems with my Mercarb

[jeepwx03]

first off I'm new to carborators. I'm pretty mechanically inclined so I'm sure I'll be able to pick it up.

I have a 3.0L Mercruiser. I was out on Saturday and for some reason I couldn't get to max RPM's or up to speed. so we took the flame arrestor off and took a look at the carb after checking for things draging off the boat or prop. on WOT the choke flap was all the way open, if we held it closed a little we could get another 10-12 mpg and 1000 RPM's out of the motor. It seems like the choke flap shouldn't be open the entire way like it was, could there be something wrong with my choke?

 

[jetty]

Re: Problems with my Mercarb

Had same problem last year. check the fuel fillter in the bowl of the fuel pump.There is also a filter in the fuel line where it enters the carb.
Also if you are useing the new ethonol blend gas you should have a good water seperater and add a non alchol based stabilizer to your fuel every time you fuel up.

 

[jeepwx03]

Re: Problems with my Mercarb

I still have to check all the filters, thats the project for tomorrow.

When you say the new ethonal blend of gas, are you taking about E85?