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Bagged '06 Silverado and '78 Eliminator Bubbledeck
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i have some crumpets at my house and some connectors if you need anything bud
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My friend just got over this same problem this past weekend!! He pulled and checked carb, all good. He then contacted Mallory and they said change out the coil, he did that, same problem!
It ended up being the wiring to the distributor and coil having bad ends that he couldn't see through the heat shrink tubing. All his time and frustration over a couple $0.10 wiring connectors!
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I would look at the coil sound like it might be problem
Take the coast guard approved check valve elbows out of the fuel tanks and try that.
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the first thing you learn when getting into any motorsport hobby (cars, marine, offroad, etc) is to NOT throw parts at a problem.
does it die when you're easing into it or when you jump on the throttle? motor stalling at 3k rpms isnt very fun, especially when your wake catches up to you. does it fire up right away after it dies or does it take a few cranks? mechanical secondaries or vacuum? HEI ignition? whats going on with your fuel lines from the tank to the carb? what diameter hose, any filters, etc. Can you get it to rev over 3k on the trailer?
Post up some pix of what you're working with. Where are you located?
for a couple of months trying to fix my boat. I took my boat in because the motor would die like it is running out of gas around 3000 RPM. So i was told the problem was do to my carb (witch was just rebuilt) so i said fine fix it. While it was there they also replaced the plugs. I got a call saying it was done, so I picked it up and went straight to the lake. Where it had the exact same problem 
, so we took it back to them that same day and they said it was the fuel pump. so I went out and bought the one he recommended (as they were to busy to work on it). Then took it back out to the lake and what do you know same problem. So I took it back for a third time to them where I was told I needed a new dist and coil, which they wanted me to pay for as it was not anything they worked on and not covered under the warranty. I was a little pissed at that point, 1st you have a 90 day warranty and you don't want to back it, 2nd why wasn't this brought up the first time. So after a couple of back and fourth phone calls we came to an agreement and he replaced the parts. So i got the call saying everything was good to go and guess what SAME PROBLEM 
. Now i am out a lot of cash and back at square one. On top off all that they want an additional 200 for me to bring it in so they can test the problem they never fixed. I'm not normally one to complain about things but this is crazy. Just Putting this out there to warn others about there service.
Low voltage to the coil/ ignition. I had it happen to my sw 18 changed everything. Ended up being that
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What ignition are you
Using?
Sounds like everyone is on the right track. Check all previously stated to rule out/troubleshoot.
Wear ring worn out feels like tranny slip in ur truck
The ignition has been touched so could be issue but sounds like fuel is getting weak flow. How old are ur tanks are they clean free off debris. The checks are usually the suspect and should be removed from pick up tubes as someone mentioned.
I had fiberglass tanks found out the hard way about replacing the entire fuel system. I would have clean carb run great a whole weekend next time out clog or restrict carb. Fixed it I had got new tanks larger lines (no checks) larger pick ups.
Fuel and fire your fire sounds new
Does it fire right up after?
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How is your fuel pressure? Can you verify if the carb has fuel in it just after the engine stalls by looking at the accelerator pump shot? Do not crank the engine or actuate the throttle until you can look down the carb.
What electronic distributor? Were any of the original ignition parts reused? Try duplicating the problem wow you have a timing light installed. Watch the timing light to see if it stops flashing just before the engine stalls.
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That or you may have an Eletrical\ignition issue??
But the motor doesnt just stop it feels like its running outa gas and if i play with the throttle when it starts to cut out sometimes it keeps running.
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Wear ring in pump worn out? Others with more experience will hopefully chim in but if your wear ring is shot the impeller can thrust forward causing a excessive load on the crank in a forward motion. I know 1 guy and heard story's of others that this has happened to. Does it react the same on a trailer start up? Or just in the water?
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I agree it's fugly looking but I'm curious to see what suspension mods they did. I'd rather get a new half ton and put my own fiberglass kit and mazzulla long travel on it
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Mine did that once at west marina and I loaded it up and checked the inspection cap on the pump and had a few rocks wedged in the impeller, got them out by hand and it's stopped vibrating and ran fine, water is getting low, I hit mud pulling into the cove, stay away from the left side pulling in there!
What is the closest launch to the cove?
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