71 Evinrude 4hp wont start

dazwitten

Cadet
Joined
Aug 2, 2011
Messages
29
Hi guys ive been trying for the last six months to get my boat up and running to take out safely lol

right here we go again, i purchased a second hand evinrude 4hp outboard as a back up which will be fitted with a outboard bracket, now the trouble i am having is that i cant get this engine to start or if it does it just cuts straight out, a friend of mine is a mechanic and even he is baffled, ok here goes......

i move the lever to run (and have tried it on fast), pull the choke about half way out (i have tried the choke in all positions) both the mixture knobs are set to in the middle ,one is idle and one is run i think.

pulled on many occasions but nothing, ok so i replaced the spark plugs with new ones and set the gap with the gauges to 0.30 which the manual suggests, i have replaced fuel with fresh fuel which is unleaded and mixed 50:1 ratio with marine two stroke oil. i have taken the spark plugs out with the leads off and checked to see if both plugs were sparking which they both are correctly a nice bright blue spark on both.

there in compression in both pots, i have checked to see if there is fuel traveling to pots which there is, a friend has suggested the carb may need stripping but he has advised me to spray a bit of damp start directly in to carbs which may clean and blow any rubbish out and hopefully start and get fresh fuel flowing.

So my question is, is there something i have not done ? its almost as if there is as kill switch operating lol

Cheers guys

Daz im determined to get in the water this year :)
 

Rick.

Captain
Joined
Jul 30, 2006
Messages
3,740
Re: 71 Evinrude 4hp wont start

No kill switch to worry about. Your needles aren't set right at mid point. Set the slow speed out 1 1/2 turns and the high speed out 3/4 from gently seated. I think it will start with these settings but let us know. I would also suggest getting yourself an original OMC service manual for your specific engine (johnson or evinrude makes no difference). Let us know how she goes. Best of luck. Rick.
 

lindy46

Captain
Joined
Nov 27, 2008
Messages
3,886
Re: 71 Evinrude 4hp wont start

You need to remove the knob or turn it around so it doesn't hit the stop. Then gently seat the needle by turning clockwise. Then back it out 1.5 turns.
 
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