Marinette Boat Forum

Agreed. Darn nice people to deal with.

I've stripped two of those Lenco electric actuators on my other boat and am not a fan of them.

Jeff

Sounds to me that you need a lot more prop! My 32 footer did 20 mph at 2,500 rpm (and still leapt out of the water).

More prop equals better mpg and less engine wear.

Jeff

..."On mine , I am able to disconnect the PCV hose from the carb and use that port to measure the vacuum. " AH, but your idle adjustment will be wrong soon as you hook that hose back up. (The PCV system is a controlled vacuum leak.) ..."What’s a respectable vacuum goal for carb adjust...

Glad to hear that! He was very cordial when I spoke with him years ago.

Jeff

Hold it! You can not use the PCV hose for your vacuum source when adjusting the idle mixture screws, or you're adjustments will end up way too rich. Every marine engine needs a PVC system due to the moisture experienced in the marine life. That said, you need to find another vacuum source to attach ...

The Holley product seems to be fairly reliable. Used several of them over the years (and still are). I suppose the ethanol in the gas does in the diaphragm of other brands.

Jeff

Sounds reasonable. A 3 blade 16 pitch is similar to a 4 blade 15 pitch (ODs being similar). The bottom line is that our beloved Marinettes JUMP onto plane compared to plastic boats, so you can use far more prop on them than is customary (and get better gas mileage). The eyes of my plastic boat buddy...

I believe those were standard on 318s.

Jeff

Yikes! Three psi is a bit weak if you're hammering on them (like in an emergency). I'd recommend bumping them to 5 psi and see if the carbs will take it. They should.

Excellent solution, by the way.

Jeff

You're signing from my hymnal! The one time gurus of Marinette, Sir John his-self (I'm a southerner now, y'all) was instrumental in the industry what cup is and how it's defined (while he worked for Michigan Wheel). Hard to 'splain in print, but an example might hep yew out: My old 32 footer was run...