Mercury, 40eojet30, 1999

by Myles
(Bainbridge PA)

Since last fall the engine loses power. Starts fine, idles fine, no misses. I power up and get on plane in about 30-45 seconds. All okay for about another 30 seconds and the the engine loses power while still in full throttle. The engine continues to seem to run fine but juat at a reduced speed of about half power or less.I replaced fuel filter, all gas lines including new gas tank. The fuel pump was rebuilt.All this done this year. Nothing has changed. Can anyone help?

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