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    Merc's 7.4 1987 mie 340's (WOT)?

    Hey there everyone, I'm could use some new idea's for my two engine's. port is 3850 and star. is 4000 RPMs (wot) one engine is getting at least 150 more rmp's at (wot) then the other one.For my boat system that would be top rpm is 4000.Even thou Merc. tells me they should be around 4200/4400...
  2. C

    RPM's going up and down

    I need a expert, I have a 1987 sea ray 340 in it is two MIE 340's My Starboard engine rpms are jumping about every 10 to 20 seconds when running above 2600 rpm,MOSTLY. I need 3200 to plane. I switch to run off the other tank and was able to run at wot for about 15 min. b-4 I had to return to...
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