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I said.. I want 6000 when I'm empty....not with 9 people. the question was does a cupped prop decrease rpms , everything else being equal.

".....and the peak of the torque curve is usually much lower than the max RPM point..." torque/rpm ....curves/graphs ...show rpm and torque curves intersecting at around 5250 rpms. Car engines....After that torque begins to drop off as rpms increase. don't know about marine/outboards but...

not speed or efficiency.... if I put 9 people on my pontoon I like seeing my motor running at the higher rpm.

it's in the range but I want to be at the max by myself.

the 6000 rpm is at the max recommended range. I want that with me on board only. Now it's 5800. It's a pontoon. Not looking for more speed or mpg. I had a merc. 3-16x12. At WOT (by myself) it hit 6150+. It let me pull teens on toons. The best I could do prop wise for that. But solo at 6000 rpm...

I have an aluminum Merc. 4 blade 14x14 that gives me 5800 rpm @ WOT. I want 6000. There is no 4-14x13 that fits my motor (4 3/4 gearcase), so I'm entertaining having a prop re-shaped. Dans Props say he can take a 4-15x13 and make it a 14x13......but it's a cupped prop. that's gonna give the same...

well, I'm not a liar....the 5200 works as does the goop. his time, money, cover.

yeah....5200. I've been using it to attach patches behind my pulled out snaps. I also use Marine Goop. The 5200 takes a while to dry and I have to check the patch to make sure edges are not releasing. The Goop dries quickly so lifting edges is minimal. I have cut out and pre made patches using...

that fuel hose is not grey, right?

that's just all goblety gook for say'n it takes a damn good pic, right?

naw...I don't do that. Never really looked at it until now, but that bright object in the upper left corner....if you expand it....it looks like a double....something...dunno..

well, It was fully dark at ,I think about 1:30 am, and a short walk from the cabin to the pontoon and there is no lighting anywhere. I used the glow, not the flashlight, from the cell phone to walk. but, I guess. or my eyes suck. and wasn't a timed exposure, just an iphone one and done.

little backstory. What I saw with my eyes did not have anywhere near that many stars. The Iphone's resolution/sensitivity obviously picked up a lot more.

I'd like to have my Merc. aluminum 4 blade 14x14 prop changed to 13" pitch....there's not a 4-14x13 out there that fits my CT 4 3/4" gearcase. (or show me). Can a shop do that?

raystown lake, nightime, July

funny, seems like I remember on here someone posting that 3500-3600 +/- rpm seems to be that sweet mpg for most boats. It actually is for my pontoon.

I've got to find out exactly what type of fuel module I have. Preliminary searches show an older styled module was changed after 2018. That had 2 pumps in it and had a repair kit available. It also runs about $1300+. I'm sure I have a VST...just gotta look it up. I have a smartcraft tach but...

no primer bulb on my line. A 2021 doesn't need it. pickup tube/screen checked, tank checked, new tank fitting with new check valve, new fuel/water separator, new, black marine fuel line. new plugs. some sources are pointing to the fuel supply module (cha ching) . You can't hear this motor at...

well, just jnside the fuel rail is one, but it's involved to get to. But how can I run 5-5500 rpm and no sputter if filters are the problem. that would be the first go to filter to change, yep. I bet that 150 does have the fuel rail filter.

well....after yesterday, I'm sympathizing with you and looking for answers again myself. This is a 2021 Merc. 115hp CT, purchased new. I thought I had solved my issue. Yesterday, it sputtered again running about 4000 rpm. Not a good feeling single engine on the Bay at 7 pm 45 minutes from my...