idles up and down from 850 to 1000 rpms or 2000 to 2200.
(ft luderdale fl)
hi have a 1998 mercury 225 efi. starts and runs at wot ok. has new plugs,beeler hoses,stater,cleaned injectors. its been speeding up and down for years. it seems like its gotten worse. I use to troll at 1500rpms for about a hour before it wood idle up and the boat would speed up and then slow down. email is firstname.lastname@example.org