Trouble with throttle

[navydocivan]

I just had my control box and cables changed and now when I go to get on plane I can floor it and. I only get 2.5k on my tach it will creep up to 3k then take off. But it tops out at 50mph vs 65 previously, mechanics say that the throttle is advancing the whole way but it’s acting like I am not pushing throttle all the way open... Motor is a 175 Mercury yr is 98 and boat is a 98 ranger. Ohh with EFI He said it may just need plugs or. A fuel filter ... any you guys got any idea what may cause this ?

[Texas_Rig]

Have you done a compression check?

[agelesssone]

https://www.yellowpages.com/hermitag...arine-26069923

[tkwalker]

Larry Hagan, tell him I sent you ... 615-289-8620 ... <'TK><