johnson 4 hp 2 stroke shed find

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gordon029

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Evening all, I came across the above engine in a relatives shed recently.Apparently it has not been run in about 10+ years but told it was a reliable motor and was used regularly before then. Seemed in ok condition and all complete . But on closer inspection of the Johnson/Evinrude schematics online there is a little ring (retainer. item 42 on the drawing) missing which allows the fuel to be turned on and off .So as the part is no longer available has anyone come across an alternative or resolved the problem using something else. Tried jubilee clip and wide cable tie without success. As this is a 30 year old engine I dont want to spend a lot of money on it but I do like a challenge and would like an engine to go with my dinghy so worth a try. All ideas welcome and thank you for reading
 
I quite like my old 2 stroke.
This 3hp Evinrude is from the mid 1960's. ... making it 50+
Seems to me very well engineered - the folding leg is great for storage.

Unfortunately they can cost as more to get going than they are worth. I believe the parts may be bought from the USA.
Mine has had some fuel issues thought to be due to modern petrol affecting the seals and the float . I haven't tried it since it was sorted out.
 
gordon029 said:
Evening all, I came across the above engine in a relatives shed recently.Apparently it has not been run in about 10+ years but told it was a reliable motor and was used regularly before then. Seemed in ok condition and all complete . But on closer inspection of the Johnson/Evinrude schematics online there is a little ring (retainer. item 42 on the drawing) missing which allows the fuel to be turned on and off .So as the part is no longer available has anyone come across an alternative or resolved the problem using something else. Tried jubilee clip and wide cable tie without success. As this is a 30 year old engine I dont want to spend a lot of money on it but I do like a challenge and would like an engine to go with my dinghy so worth a try. All ideas welcome and thank you for reading
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Tell us a the exact year or preferably the model number and which engine section you are referring to then we can find the appropriate parts diagram and will know exactly what part you are talking about !

part 42 on the diagram I have in front of me is the choke knob!

convert
 
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Lodesman77 said:
I had one. I hated it. I was happy when it fell off the stern by accident. Please don't restore it.
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Generally reckoned to be one of the best small small outboards.

I reckon the trouble with yours must have been the nut that held the tiller :)

Worth half a dozen of your Yamazukihatsus
 
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The smoothest and easiest to start small outboard.

I had the 6 hp variant and it was a reliable workhorse for years. The spline that drove the vertical shaft wore out and after a temporary repair with JB weld kept it going a while longer it went to the great scrapyard in the sky.
 
Note to OP: It's worth checking that component 17 in the above sketch has not been broken. It's the cam follower for the throttle and may be made of plastic that's become brittle.

If so, repair by moulding into a solid block of Milliput.

Good luck!
 
Firstly thank you one and all for your responses and recommendations.The carburetor in the picture is similiar but not quite the same. On mine there is a plastic arm coming down from the spindle type thing which when pulled out operates the choke and when the spindle is turned opens the fuel supply.So when I turn the spindle the plastic arm does not move and that is my problem. I have searched online for the correct model on both Johnson and Evinrude sites but unfortunately cant find an exact match but I will keep looking . The model is a Seahorse 4 hp and I think it dates from the mid eighties.I would love to put up a picture but alas that is getting into dark arts territory .So once again thanks for the advice and if anyone thinks of a solution I would be delighted to hear from them
 
gordon029 said:
Firstly thank you one and all for your responses and recommendations.The carburetor in the picture is similiar but not quite the same. On mine there is a plastic arm coming down from the spindle type thing which when pulled out operates the choke and when the spindle is turned opens the fuel supply.So when I turn the spindle the plastic arm does not move and that is my problem. I have searched online for the correct model on both Johnson and Evinrude sites but unfortunately cant find an exact match but I will keep looking . The model is a Seahorse 4 hp and I think it dates from the mid eighties.I would love to put up a picture but alas that is getting into dark arts territory .So once again thanks for the advice and if anyone thinks of a solution I would be delighted to hear from them
Click to expand...

You refer to "part #42 on the drawing"
Where is this drawing ? What is the engine model number ? See the ID plate on the transom clamp bracket

Is the link #36 in this diagram Do you need part #36. It is available if you do

convert
 
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MartynG said:
I quite like my old 2 stroke.
This 3hp Evinrude is from the mid 1960's. ... making it 50+
Seems to me very well engineered - the folding leg is great for storage.

Unfortunately they can cost as more to get going than they are worth. I believe the parts may be bought from the USA.
Mine has had some fuel issues thought to be due to modern petrol affecting the seals and the float . I haven't tried it since it was sorted out.
Click to expand...

Yachttwin ???
 
I have one and it is brilliant. Light and bullet proof. Always starts and is very powerful for its size.

It is noisy and smoky but I do not mind that. Half the weight and more power than the nearly new Honda 5 four stroke that I have but never use.

Can you not run a new fuel cable to the carb and bypass the fuel isolation valve with a connector on the end that seals when not connected to the fuel tank line (if I have understood the problem correctly).
 
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Unrelated to your carb issue but have you checked for a spark on both cylinders? . As well as brittle linkages they do suffer from ignition problems. As another forumite correctly pointed out ignition spares are readily available in the states and not too expensive. ...but the shipping and import tax and charges will make you cry
 
steve66 said:
Unrelated to your carb issue but have you checked for a spark on both cylinders? . As well as brittle linkages they do suffer from ignition problems. As another forumite correctly pointed out ignition spares are readily available in the states and not too expensive. ...but the shipping and import tax and charges will make you cry
Click to expand...

I order spares from Oakley Marine aka Outboards direct. I dont know if they still do but in the past they have come from a warehouse in Belgium.
 
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