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TOPIC: 1952 DR Restoration "the Marathon Special"

1952 DR Restoration "the Marathon Special" 21 Sep 2019 04:26 #99217

The quick release have o-rings in them that can wear or get nicked and when that happens it will drawl air and could make the fuel delivery erratic. I had a line go bad once, cracked and drawing air, so I ended up just putting the line on the motor without the quick release. It kept me off the rope of shame to get back to the pier at least. The incorrect amount of packing or old worn packing can be a issue for a no happy spot if it hasn't been changed or run in years. A starving for fuel at higher RPM if everything else is good at slow speed could be a float set too low. Just brainstorming with you, I hope the different tank will sort it out for you.

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1955 Vagabond
1956 30hp Evinrude Lark
1973 Glastron GT 150

1952 DR Restoration "the Marathon Special" 20 Sep 2019 22:22 #99210

Planning on dropping off daughter at school and heading up, should be there before or close to noon.

At one point or another I have been at those exact settings. My base was at 1 out each and I played from there. At this point I do not think it is needle adjustment I have tried them all, I do feel the problem must be elsewhere. Thus my tank/float/needle thinking.

Merky, would love to test a known tank to eliminate that possibility.

Just a thought, could there be an obstruction in the quick release fuel line? I took apart the tank end but not the engine end. I was thinking of bypassing it and running the hose direct to the barb on the motor and carb, just trying to eliminate possibilities one at a time.

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1952 Deluxe Runabout

1952 DR Restoration "the Marathon Special" 20 Sep 2019 22:10 #99209

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what time wednesday you getting to Arrowhead, earlier the better

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Last edit: by jabe.

1952 DR Restoration "the Marathon Special" 20 Sep 2019 22:04 #99208

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my experience.........set your needles........slow speed 1 1/2 turns out, fast speed 3/4 turn out.......tank test its gonna run.........if it runs, get out on the water........fast speed is your first adjustment at wide open.....when its warmed up....tune it in to happiness........i found all my 30's set in around 5/8 of a turn out........then you can adjust slow speed.......but not till after fast speed is happy.........then slow is a process in gear.......if you done all this, then the need to look elsewhere is next

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1952 DR Restoration "the Marathon Special" 20 Sep 2019 21:55 #99207

Merky, I was fiddling with needles trying to get it to go. For the slow speed top needle it would idle OK and I could adjust leaner and get a bit more power till it would quit, then adjust richer and it would run. Opening it richer just made it terrible. High speed I tried everything from near full closed to two and half open, leaner was better to a point but neither helped.

Neil, I define fiddling with the tank to be opening the lid and checking for pressure, trying to run with the lid not on fully tight bleeding off some pressure, taking lid off and trying (that didnt work long), hitting the silver prime button and shaking it. (I think that was whet I did to make it run good)

I did notice if I throttle down to idle and then give it a go it will take off for a second then go flat, like it is running out of gas. Otherwise I could do a 1/3 throttle and just putt along. If i would edge it up to near half it would bog.

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1952 Deluxe Runabout

1952 DR Restoration "the Marathon Special" 20 Sep 2019 21:26 #99206

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bring it to Arrowhead, am sure with all the minds there we can get er solved for you......i have what tools i have to bring, i need to tinker when not cruising.........

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1952 DR Restoration "the Marathon Special" 20 Sep 2019 21:13 #99204

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re-define fiddling with trhe tank........:hmm:

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1952 DR Restoration "the Marathon Special" 20 Sep 2019 21:11 #99203

I have a working OMC pressure tank that I can loan you to do an A/B comparison. Either you or Chip can swing by and pick it up. I may have a needle and seat assembly in my "possible box."

Where do you have your HS and LS needles set?

Merky

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1952 DR Restoration "the Marathon Special" 20 Sep 2019 21:05 #99202

Been a busy two weeks and not much got done. I had discovered that I had made a reassembly error in routing the vacuum cutoff wire that was keeping the motor from going full throttle and corrected that. The wire was literally limiting travel, oops. I also took the flywheel off and re-timed the motor and found my coil ground wires starting to rub on the flywheel and rerouted them. Ran it in the bucket and all seemed well, better more smooth idle.

Made it to the lake today with Dr Chip and not much good to report, still would not go. I have deduced it down to a fuel starvation problem. I fiddled with the tank and for a brief moment after that she stood up and roared to life. Though unfortunately I was in a no wake zone and had to shut it down and could not repeat it. I do not think it is a tank problem. It builds plenty of pressure, though the time it ran well was after messing with the tank. If I open the cap I get a big woosh of pressure coming out. If I push the button fuel goes in the bowl. I put all new gaskets and diaphragm in and there are no leaks. Air is coming in and fuel is going out, no issue?

Thus I think it is a float/needle problem and not a tank problem. Not enough gas getting in to make it run. I do not think I will be able to get parts before I leave for Arrowhead on Wednesday unless any of you have some in stock and can throw them in the mail ASAP. Chip has graciously offered to let me borrow one of his extra steeds.

But I'm not totally sure, could be the tank........

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1952 Deluxe Runabout

1952 DR Restoration "the Marathon Special" 27 Aug 2019 23:47 #98627

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Will help with it as soon as we finish up local vintage karting weekend....seriously..
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