Mercury 115 elpt efi 2007

by Dan Kegley
(Spokane WA)

Starts right up idles smoothly and runs smoothly until 2000 - 2200 rpm and then begins to stumble/bog down and drops 400 - 500 rpm. I have replaced both fuel filters, the fuel lines, the plugs and there is 45psi to the fuel rail. My next guess is a MAP sensor but I am not sure. thoughts?

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Sep 09, 2021
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starstarstarstarstar 		Fixed
by: Anonymous

I was able to resolve the issue. Prior to my post I had replaced fuel filters, fuel line and plugs which did nothing other than give me piece of mind. I then cleaned the map sensor which really wasn't all that dirty but when I inspected the throttle position switch it looked a little gummed up and the throttle body itself was okay but not clean by my standards. With the sensor off I had my son advance the throttle and the throttle body did not open. I cleaned it, lubed it reassembled everything and it works great. No stumble at all from idle to WOT.
Sep 04, 2021
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starstarstarstarstar 		2004 yamaha 225
by: dougAnonymous

i am into electrical right now will let you know how it works out

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