Problems with 1959 Evinrude Lark. 35hp

[Toughlife200700]

I have a 59 35 lark. I have cleaned the carb readjusted the carb redone the ignithion system and still i have a problem. Its acting like its skipping, it backfires every once in a while and its acting like its fouling out the plugs but its not fouling them at all. I have rebuilt the fuel pump also.. what could cause this problem? could it be the plug gap or the point gap or could it be the carb? i need help here it will run for a few minutes but then its like it fouls the plugs out and it quits then takes forever before it will start back up.. Also how mant turns out do i need to adjust the air and fuel screws to be in adjustment right?

 

[HighTrim]

Re: Problems with 1959 Evinrude Lark. 35hp

May just be running too lean, try backing out the low speed needle, in small increments, which is CCW, to richen the mixture and see if it helps some.

The initial setting for the low speed needle is 1.5 turns out from gently seated, the high speed is 3/4 turns out from gently seated.

 

[1946Zephyr]

Re: Problems with 1959 Evinrude Lark. 35hp

What was involved with "re-doing the ignition system?" New coils? new spark plug leads? A lot of people replace coils without new spark plug leads and connection often times fails, when old wires are used with new coils. This is because the ends aren't trimmed for a fresh new connection. This is somthing where being more specific will help us determine your issue. Bad spark plug lead connection can also act like carb issues, too.

 

[ronboonville]

Re: Problems with 1959 Evinrude Lark. 35hp

My points looked good but finally figured out that the rub blocks were so worn down that I think the points were grounding out. spark plug wires from Tractor Supply, for a ford tractor work. about $8.00.

 

[Toughlife200700]

Re: Problems with 1959 Evinrude Lark. 35hp

yes i changed the coils, wires, points, and plugs. all this is new.. i have been starting to set the high and low speed ar 2 rounds out from gently seated.. plus i seen something about a 24:1 gas to oil ratio and i have been using a 50:1 ratio.. could this have an affect. also. this could explain all the oil that im seeing around the tips of the plugs.. i am also going to post a pic of this motor also so i can figure out the model of it.. i know its a 59 due to the serial number but all of the pis ive seen of a 59 doesnt look like mine..

 

[Chinewalker]

Re: Problems with 1959 Evinrude Lark. 35hp

A 1959 will have Golden Jubilee tag on cowling as it was Evinrude's 50th anniversary year. BUT, cowlings from several other years would fit with little or no modification, so it's possible the original was lost or damaged and has been replaced.

Oil ratio wouldn't have any bearing on it starting or not, just how long it will last afterwards...

Wet plugs generally mean a spark issue...

 

[Tim Frank]

Re: Problems with 1959 Evinrude Lark. 35hp

yes i changed the coils, wires, points, and plugs. all this is new.. i have been starting to set the high and low speed ar 2 rounds out from gently seated.. plus i seen something about a 24:1 gas to oil ratio and i have been using a 50:1 ratio.. could this have an affect. also. this could explain all the oil that im seeing around the tips of the plugs.. i am also going to post a pic of this motor also so i can figure out the model of it.. i know its a 59 due to the serial number but all of the pis ive seen of a 59 doesnt look like mine..

A few questions:
1) How was it running before you did all this work? i.e,. are these new problems or continuation of where you were?
2) How are you mixing the gas/oil? 50:1 has less oil than 24:1 ...which is the mix that you should be using in that engine....24 parts 87 Octane to 1 part TCW-III oil.
3) Are the new plug wires mariner grade copper core or did you use automotive wuires?

 

[kfa4303]

Re: Problems with 1959 Evinrude Lark. 35hp

+1. You want to run 24:1 mix (5.5 fl. oz. to 1 US gallon of 87 cotane gas) along with Champion J6C plugs, using 7mm COPPER CORE wires. Graphite core, automotive wires will not work correctly. Here are some great all around tune up links. Some of the models shown are different from your motor, but all of the basic steps are the same.

http://www.marineengine.com/parts/v...evinrude-johnson/ITEM_2978/ITEM_297800001.htm

http://www.duckworksmagazine.com/04/s/columns/max/24/index.cfm

http://www.outboard-boat-motor-repa...on 3 HP 1952-1967 Ignition System Tune-up.htm

http://www.outboard-boat-motor-repa...hnson 5.5 HP 1954-1964 Carburetor Tune-UP.htm

http://forums.iboats.com/showthread.php?t=167352

 

[Toughlife200700]

Re: Problems with 1959 Evinrude Lark. 35hp

the problem when i got it was the fuel pump. it was pumping enough to fill the glass bowl on the pump but not enough to get to the carbs so i redone the points omc coils with the wires that came with them from the dealer. i have been running 50 to 1 mix. not the 24 to 1. just found out last night on this site that it needs 24 to 1. i adjusted the carbs like was stated earlier in this post and it fires right up now but the problem is now it fires up for about 5 to 10 seconds then dies.. will nt stay running.. guess its back to the fuel system now.. i also re gaped the points which were to close. set them at.020 and the plugs were gaped at .040 so tightened them up to .030.. im using NGK B7HS10 plugs.. are these plugs hot enough or do i need to change them.. thanks to all for helping me with the points and carb adjustments..

 

[HighTrim]

Re: Problems with 1959 Evinrude Lark. 35hp

Well good now its running.

Will pumping the primer bulb keep it running?

I use the Champs in my OMCS, but to each their own.

 

[Toughlife200700]

Re: Problems with 1959 Evinrude Lark. 35hp

no it will not even try to start after i pump the buble. starting to think i need to teardown the carb and give it a good cleaning. i drained the bowl and just let the fuel pump fill it back up without pumping the bubble. it ran great then started to die down sounded like it was skipping, i pumped the buble cause i thought it was running out of gas and it killed it and now i see gas coming out of the front of the carb. think the float is stuck.. could that be my cause?

 

[Tim Frank]

Re: Problems with 1959 Evinrude Lark. 35hp

That could certainly flood it out.

 

[kfa4303]

Re: Problems with 1959 Evinrude Lark. 35hp

Yeah, a good carb cleaning never hurts. You can get a rebuild kit from right here at iboats for about $20.

 

[1946Zephyr]

Re: Problems with 1959 Evinrude Lark. 35hp

One thing I have found about those Big Twin class carbs, is if the float drop is too much, they will puke gas out and be hard to start. There is a little tab on the arm on the float. What I do, is set the float at the closed position then I push that tab in with a screw driver. This here will let the float drop, just a little bit. If you can, get a plastic float for it, because those are so much more bouyant than the older style cork floats and they last a lot longer.

 

[Toughlife200700]

Re: Problems with 1959 Evinrude Lark. 35hp

ok i have gotten it running great with the cowl off.. lol put the cowl on and it floods out. it is pukeing gas like crazy with the cowl on so i guess i need to bend the float tab so the float is not as high. that way it will close the needle sooner.. trying to upload the pics now also..

 

[Toughlife200700]

Re: Problems with 1959 Evinrude Lark. 35hp

OK narrowed it down to the high idle screw adjustment.. it seems to be turning on its own and will not hold setting.. I don't have the linkage to the top of the carb to adjust it with so had to run the engine with the cowl off.. could that little cork washer in the back of the retaining sleeve being bad and not letting the set screw hold setting be causing all of my trouble? also is the cowling in the above pic for a 1959 model 35 lark? i know by the serial and model number the engine is but is the cowl authentic also...

 

[Chinewalker]

Re: Problems with 1959 Evinrude Lark. 35hp

That's a '58 cowling.

Try tightening the packing nut for the high speed screw. If that doesn't snug the screw from turning, you may need to replace the packing material. If the screw closes off the fuel when running, then yes, that could cause your issue...