Your manifold pressure is going the wrong way. At idle was the vacuum steady? You said you replaced TMAP, is that the MAP sensor? That would be my initial thought, or intake restriction somewhere. Is your throttle opening all the way? Fuel trim is good, which means that whatever air it thinks...
Much easier when hanging, but possible without. Raising/lowering the front with a hoist is much quicker than turning the adjusters individually a turn at a time.
Where did the mercruiser #'s come from? scott's link looks like the VPs are closer to your current setup than the stock OB setup. Anybody have the skill to overlay all 4 graphs? Ted, do you have a GPH graph of your new setup yet?
Also interesting on the VP test that there isn't too big of a MPG...
1. Do you have that graph from your old setup?
2. I'd like to see an MPH x Time graph...wonder if they'd still overlap
EDIT: Oooh... Space the dots out every x seconds, and keep the rpm v. mph on the axes.
Yup, I also assumed carb initially and rebuilt it yet again. If you don't have one for your 'rude (and if it's a CDI type system), definitely get a DVA. Nearly impossible to troubleshoot properly without one. The merc also has a spark at the plug, but very weak. About to (hopefully) fix it with...
Yeah, ha ha actually going through that right now with my Merc. Has spark with the light but weak on a gap tester. Still a good first test I think, and if it's missing you know it. Also guessing that a weak but not absent spark is more common with a stator driven ignition, multiple places to...
I mounted my pump to a piece of metal, which lays flat at the bottom of the bilge. It's stable enough that I never fastened it to anything. Easy enough to remove and replace
