1959 Lark 35hp

[goodrich18]

I recently purchased a 1959 Evinrude Lark 35hp motor. I ran two tanks of gas through it and it was running great. I was told by the person that I purchased the boat from to run a 50:1 mix. Needless to say that I filled the tanks and now I have problems running at high speed. The motor idles and runs at low speed fine. Once I try running at higher speeds, the motor seems to bog down and hesitate. Any suggestions.

 

[tashasdaddy]

Re: 1959 Lark 35hp

mix is 24:1 tcw3 outboard motor oil. it may be getting hot from not enough oil, when was the impeller last changed?

 

[CATransplant]

Re: 1959 Lark 35hp

The first suggestion is to immediately stop using 50:1. That outboard should absolutely be run at 24:1.

Now...have you damaged it with your two tanks? Possibly. But the symptoms wouldn't necessarily be what you describe.

Before we can really go any further, we need to know what work you have done to that engine since you bought it. New Impeller? Carb rebuild? New coils and points? New spark plugs (which, exactly)?

Your symptoms could be from any of those areas, or others.

There are several of us here, who own, or who have owned (like me) that engine or one almost identical to it. We can help you, but we need as much information as possible about work that has already been done, so we don't take wrong directions in trying to help you.

 

[goodrich18]

Re: 1959 Lark 35hp

I changed the impeller prior to putting it in the water this week. I changed the impeller because it wasn't in the water for two years. I have a good spray and that seems to be fine. That's the only work I've done to it. I did check the plugs to see if they were o.k. and they appear fine.

 

[larky]

Re: 1959 Lark 35hp

some people say you can run 50:1 ratio but I could never bring myself to do it. now from your description of of how its running it could just need to be leaned out with the high speen needle. not to much just enough to smooth it out no more. as you look at the front of the carb you should see three little levers. two of which are conected with a link rod. that is your high speed needle. if the front plate is still there it will have lables on it. while on the water and in forward bring the engine to wide open throttle and adjust slowlly, turning clockwise.

 

[goodrich18]

Re: 1959 Lark 35hp

Larky,

Thanks. I did try to set the high speed, but didn't help. It acts as if it is starving for gas at high speed. At low speed and idle it runs fine. I have the old style gas tanks and didn't have them cracked for air. Could that affect the gas flow at higher speeds?

 

[goodrich18]

Re: 1959 Lark 35hp

Larky,

Thanks. I did try to set the high speed, but didn't help. It acts as if it is starving for gas at high speed. At low speed and idle it runs fine. I have the old style gas tanks and didn't have them cracked for air. Could that affect the gas flow at higher speeds?

 

[vonitha]

Re: 1959 Lark 35hp

hi
we just bought a evinrude lark 35 hp
S# 23534

what yr is it and what ratio???????

thank you very much

 

[goodrich18]

Re: 1959 Lark 35hp

Vonitha,

You need to find out the model number. The model number for my 35hp lark is 35516, which is a 1959. If you read some of the posts, they recommend 24:1 tcw3 outboard motor oil for this motor. There are websites available to put your model number in and it will tell you what year motor you have.

 

[Tmacular]

Re: 1959 Lark 35hp

ive got a 59 lark as well #35516 and i was told to put 50:1 in it as well but i noticed it runnin a bit rich. so thats probably my prob. thanks for the info on 24:1 ill give her a shot

 

[tashasdaddy]

Re: 1959 Lark 35hp

sure sounds like they all need carb kits and floats. laingsoutboards.com. and the setting the carbs per Joe Reeves settings. once you get them set by these settings you should not have to touch them.

 

[tashasdaddy]

Re: 1959 Lark 35hp

(Carburetor Adjustments - Two Adjustable N/Vs)
(J. Reeves)

Initial settings are: Bottom high speed = seat gently, then open 1 turn out. Top slow speed = seat gently, then open 1-1/2 turns.

Setting the high and low needle valves properly:

NOTE: For engines that DO NOT have a shift selection, obviously there is no NEUTRAL position. Simply lower the rpms to the lowest setting to obtain the low speed needle va /lve adjustment.

(High Speed) Start engine (it will run pretty rough), shift into forward gear, take up to full throttle. In segments of 1/8 turn, wating for the engine to respond between turns, start turning in the bottom high speed needle valve. You'll reach a point whereas the engine will either start to die out or spit back (sounds like a mild backfire). At that point, back out the needle valve 1/4 turn. Within that 1/4 turn, you'll find the smoothest setting.

(Low Speed) Slow the engine down to where it just stays running. Shift into neutral. Again in segments of 1/8 turns, start to turn the top needle valve in. Wait a few seconds for the engine to respond. As you turn the valve in, the rpms will increase. Lower the rpms again to where the engine will just stay running. Eventually you'll hit the point where the engine wants to die out or it will spit back. Again, at that point, back out the valve 1/4 turn. Within that 1/4 turn, you'll find the smoothest slow speed setting.

When you have finished the above adjustments, you will have no reason to move them again unless the carburetor fouls/gums up from sitting, in which case you would be required to remove, clean, and rebuild the carburetor anyway.

 

[vonitha]

Re: 1959 Lark 35hp

thank you very much,
i love you guys with all this information.....!!!!!!

 

[vonitha]

Re: 1959 Lark 35hp

where would the model # be???

all i could find was the S#

thank you again