Topic: 1958 Evinrude Lark carb leaking – Antique Outboard Motor Club,Inc

This topic has 11 replies, 9 voices, and was last updated 9 years, 3 months ago by 1946zephyr.

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May 20, 2016 at 12:21 pm #4317
1976jeepcj-gmail-com
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Hey there, just rebuilt the carb and fuel pump on my Lark. When I run the engine there is fuel running out of the front of the carb. Not sure if I have the float set correctly, both top setting and drop setting?? Are there any tricks of the trade to setting up a Lark carb? The Lark is going on my 1959 Lone Star Malibu. Can’t wait to rig it up!! Any input appreciated, Thanks! Steve
May 20, 2016 at 1:00 pm #36848
cajuncook1
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Did you replace the float on your carburetor? If it is the original float, its bouncy may be lacking and prevent the float pin from shutting off fuel flow to carb when the carburetor bowl is full. Did you remove and replace the old packing from the high and low needles?? You can test the float in a cup of water, just dry it off well. Make sure float is parallel with the carb body.
May 20, 2016 at 2:08 pm #36853
frankr
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If you used a float valve with the clip, the clip does NOT go through the hole in the float. It goes over the edge.
May 20, 2016 at 3:57 pm #36862
1976jeepcj-gmail-com
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Hey, thanks for info. I am using the cork float. It looks like it was coated with something clear. Would like to find a new style float like you have in the pics. Did align float flat with with top of carb body. I will pull out float a ck if it floats correctly. Any idea if the float drop effects operation of carb and what it should be set at?
May 20, 2016 at 4:02 pm #36863
1976jeepcj-gmail-com
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Oh p.s. did replace packing as well. Is there a plastic piece that goes with the packing?? Fuel is coming out of throth of carb not bowl vent.
May 20, 2016 at 4:13 pm #36865
wedgie
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A picture is worth a thousand words 😉 credit to: http://www.maxrules.com/fixtuneitup2.html
May 20, 2016 at 4:23 pm #36866
seakaye12
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As a general rule; the BRP carb kits include the new float as shown in the above pics; the generic (Sierra etc) carb kits do not include the float.
May 20, 2016 at 4:45 pm #36870
1976jeepcj-gmail-com
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Thanks guys, right on target. It was a Sierra kit. Going to find the part# of float and get a newer style. Great pic of float position!!
May 20, 2016 at 6:52 pm #36874
chris-p
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I actually don’t agree with perfectly level.

I like the un hinged end slightly higher, just slightly, than the hinged end. This ensures that the needle seats, when the bowl is filled.

As stated, along with the float setting, it may bee too heavy, needle/seat could be defective, the float could be catching on the bowl gasket, things like that.
May 20, 2016 at 7:49 pm #36879
opposedtwin
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Agree with Chris here. There could be many reasons for the fuel flow. Chris has hit many of them. Is your pivot pin smooth and free of any scratches or imperfections? Is it true? Meaning straight and not warped or bent? Is the gasket too long on the inside of the carb bowl? Often times the gaskets from Sierra have to be trimmed as their fit is off and could impede the free movement of the float. Make sure the float is buoyant and sealed.
And don’t ever buy from Sierra again. It’s 90% crap. I’ll be getting lots of flak over this statement but I won’t buy it unless there are no alternatives. Just sayin……
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