JW-14 (Johnson 1958 – 3 HP) Carb Syncronization

[Biddaddydan]

All manuals call for aligning the mark on the cam (I guess !) with the cam follower at the point where the throttle plate starts opening up. Fine but there is no mark on my cam. It might have been polished off or otherwise erased at some point but could any of you knowledgeable people give me a measurement of where that mark should be on the cam.?

Regards from Montreal, Province of Quebec, Canada

There are no old outboards, just machines so well built, they have outlasted their owners !

[Mumbles]

Bonjour! You are correct, there are no marks on the cam, but there are on the gas tank ring. Look carefully at the word ‘SLOW’ and you will see two little dots cast into the ring. The speed control lever must be placed between the dots and the linkage adjusted so the carbs butterfly is just starting to open at the same time.

[crosbyman]

see pages 102 -103 in the Johnson red book

members only section … inner sanctum …. library …. Garry Spencer’s drop box download the red book look up pages 102-103

cam and cam follower touch when the speed control right hand side edge just meets the embossed DOT after the word SLOW

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[BRENT BERGEN]

Along the same line, where is the mark or marks on the classic Evinrude Lightwin? The tank base doesn’t protrude like the Johnson JW series, and no marks are visible on the outside. Haven’t seen a mark on the bronze carburetor advancement cam either.

Improvise-Adapt-Overcome

[Mumbles]

The Evinrude Lightwin is the same as the Johnson JW but slightly different. Where the two dots are on the JW, the Lightwin has a notch on the underside of its ring. It’s not easy to see without bending down and looking up at it.

This photo shows the notch, thanks to seakay 12.

• This reply was modified 4 years, 1 month ago by Mumbles.
• This reply was modified 4 years, 1 month ago by Mumbles.

[BRENT BERGEN]

Thanks Mumbles and seakay. This subtle reference mark on the Evinrude Lightwins has long been a mystery to me.

Improvise-Adapt-Overcome

[Biddaddydan]

Mille mercis Mumbles !

Will now set the the cam follower properly but maybe you also could help me with another problem I’m having. The motor starts fine, runs relatively smooth but will not rev up with some fuel spitting out the carb’s intake. Fire seems right at the spark plugs and the carb was rebuilt.

I found a forum thread on this one but it did not provide definitive information.

Regards,

Daniel

There are no old outboards, just machines so well built, they have outlasted their owners !

[crosbyman]

was the float adjusted parallel to the carb body ? do a blow test on the carb before reinstalling it

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Biddaddydan

[Mumbles]

The reed valve petals in these motors are very unforgiving and have to be in perfect condition for the motor to run correctly. One reed may be deformed or have a small piece of crud under it not allowing it to close properly. Might want tp pull the reed plate off and hold it up to the light to see how the petals are laying down.

[seakaye12]

After Years have gone by and Photbucket has screwed with thousands upon thousands of images ….I figure it’s time to post a better image of the Lightwin’s Link and Synch “Notch”.

Also….see the reeds in a Lightwin that I recently worked on. Somebody must have purposely set them that way? An Air Gap on each petal! Talk about a mystery problem. Who would look for something like that?

• This reply was modified 4 years, 1 month ago by seakaye12.

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