Does this sound like water in fuel??

[StarTed]

It might be that the low fuel level allowed the fuel to slosh around more moving those flakes around to help close off the fuel intake.

By the way, if you make a new tube don't cut it off square and hit the tank bottom or you'll starve the fuel again.

My brother had a Model A that had a rusty fuel tank. We had to disconnect the fuel line from the carburetor and blow back through it in order to run another short distance. We were teenagers and the car cost him all of $10 but it did have one functional brake and the engine ran (we cranked it).

I think you are on the right track pumping out the tank and replacing the pickup tube.

 

[Fun Times]

I hooked it up to remote tank and it ran great. I put it back on my main tank (with new anti siphon) and put 50 gallons of fresh Non Ethanol 91 in it.. I took off today and same thing happened. It doesn't like it when the secondaries open up.. RPM's bounced all over from 3k-4k. It ran 20 miles today at 3k or less..no issues...but waves and wake will change rpm over 3k. I think I have a blockage somewhere. I tried removing the gas cap.. no change.
I also noticed the fuel filter is half full when on main tank.. it was full (FULL) on remote tank...

You may want to try a new rubber hose between the tank and fuel filter assembly as the rubber tends to disintegrate/splinter internally over time causing fuel flow disturbance at higher RPM.

 

[capecodder116]

As I was reading all the posts and all the suggestions being made I remembered having a similar issue. As Fun Times suggests replace any rubber hoses. I had a problem which drove me crazy until I replaced the section of rubber fuel line. Apparently what happened over time was a portion of the interior wall weakened and line would collapse causing a fuel flow restriction. It's worth a shot and for me was a very easy replacement. I went thru my entire fuel system from the fuel tank vent to carb rebuild and everything in between before I found this. It's not so rare to have this problem these days cause if you have older rubber fuel lines anywhere in the fuel system the ethanol fuels feasts on them. I think new rubber fuel lines are made to withstand the ethanol fuels. Best of Luck..!!

 

[BajabossJD]

Great suggestions guys.. I did put a new rubber hose on a few months ago.

I'll grab an extra fuel filter when I take it out on Saturday. My concern now is that those small little flakes (I think I got the most of them)..will make the anti siphon valve stick. That would shut me down real quick..grr.. I did remove the screen on the bottom of the pick up.

I don't want to get rid of the anti siphon valve as the coast guard could be difficult about it ( my boat is also in high and dry storage..don't want a freak accident to happen).

Looks like its a Test and Tune day on Sat (I'll make sure my sea tow is current lol)

Joe

 

[johnkom]

I fought a similar problem this summer. Did all the stuff you did. It ended up being the fuel pump. It had a weak spring. I assume it was unable to return all the way at high rpm (float.) Remember in a mechanical pump the spring moves the fuel. not the lever. Keep us posted.

JK