low rpm @ wot

Hi everyone. So my 2003 240DA with 5.0MPI went in the water yesterday. She started up and idled fine. Cruised smooth through no wake. But when I opened her up she hit 2500 and would go no further. Right at 2500. Did not seem to bog. Didn’t stutter. Just would not go to higher RPM. No alarm...

2005 SD 320. Merc 350mags. Last season after experiencing reduced RPM and vibration from my port engine (wouldn't go over 2,600rpm under load). Mechanic suggested a full tune up. they replaced, spark plugs, cap and rotors, fuel filters, flame arrestor. I ended up gaining about 200 rpm. I...

New to me, 350 hours each repower I did late last year. LA Fire Rescue engines, but they did sit for a couple of years without being run. I've been fighting some issues where things got mis-adjusted, and some stuff just didn't work. I did refresh most of the ignition just because it's been 20...

I have a 1990 Searay Sundancer 420 with cat 375 hp 3208 engines.I have 22" by 26 pitch 3 blade props, Sea Ray says this is correct props for my boat when I gave them serial number. Boat is supposed to turn 2800 rpm at woot I am only turning 2500, had a cat mechanic check out engines and he said...

This afternoon our 2000 310DA with V-Drives gave us some trouble on the starboard side. As we throttled up to cruising speed the starboard engine RPM maxed out at 3000rpm before the boat even came up on plane. We could advance both throttles, and the port side would continue to increase the...