OMC fix jet carburetors part 10 of 10 (Motor displayed 1968 Johnson 6hp)
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- čas přidán 21. 02. 2014
- General information, cleaning and carburetor kit application of OMC, Johnson and Evinrude outboards from 1964 to 1970's. Some of this information can apply to OMC, Gale, Johnson and Evinrude motors from mid 1950's to 1960's outboards that have a low speed and high speed needles.
You can somewhat set the low idle screw/needle in the barrel, but it is best done under load on the boat in the water.
Here are some instruction on how the accomplished setting the low speed needle with a fix jet high speed carburetor.
Make sure these are your beginning carburetor settings:
Facing the carburetor you will notice slow speed and idle knob.
- Top needle is your slow idle needle. You will gently turn in (clockwise) until the needle is gently seated..please don't force. Once seated, you will turn out (counter clockwise) the slow idle needle 1 1/2 turns. Leave it there for the time being.
- You do not have a high speed needle. You have fix high speed jet. No adjustment necessary.
Carburetor Adjustment
Initial setting is: Slow speed = seat gently(turn in clockwise), then open 1-1/2 turns(turn out counter clockwise). Do not tighten or force the slow idle needle shut or it may damage the needle.
Start engine and set the rpms to where it just stays running by turning the tiller grip toward slow until it almost starts to sputter. In segments of 1/8 turns, start to turn the S/S needle valve in (clockwise). Wait a few seconds (10 to 15 sec) for the engine to respond. As you turn the valve in(clockwise), the rpms will increase. Lower the rpms again (turn your throttle slightly slower) 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 (sounds like a mild backfire). At that point, back out(turn out counter clockwise) the S/S valve 1/4 turn. Within that 1/4 turn, you'll find the smoothest slow speed setting.
When you have finished the above adjustment, 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. Don't forget to snug tight your compression nut on your slow speed needle to prevent it from easily being mal-adjusted unintentionally. - Věda a technologie
I am a green newbie at this and I have to thank you because these videos were exactly what I needed to get this job done! Thanx a million!
+Mark Hartley
You are so very welcome! Please be safe on the water and carry extra shear/drive pins in case the prop hits a log or rock. All you need is a crescent wrench, needle nose pillars, and screw driver in the boat to replace the shear pin.
fantastic info thanks' as I have two 6HP motors great engines greetings from Scotland
That was great. Lots of info. Thanks
Nice work! Thanks again... From novice John!
Delighted the videos helped you out. Nothing like fixing your own motor and going fidhing.
Well done instructional video. Made rebuilding much easier and more thorough than if I stumbled through the process on my own. Thanks.
Glad they helped you out.
Thanks for the videos they were a great help. Especially the one on the ignition system. I had never worked with points before and always heard from my dad how difficult it was... your videos made it very easy..
Well, Cajun, ...awesome video. I was always cringing at the thought of doing these small carbs., but not now; should be a cakewalk. I just picked up a 1990, 8HP Johnson, lightly used and stored for 10 years high and dry. As soon as my broken ankle heals I'll be all over this cleaning/rebuild like white on rice. Thank you, and I'll keep you posted on my [expected] success. S.
Glad, to help you gentlemen out! See ya out on the water and happy wrenching.
Thank yoy for the video. You have made the best video i could find
Hey, thanks. been trying to find something like this. I have 1968 Evinrude 9.5. Never worked on anything. Carb looks very familiar. Now I will give it a try. Thanks again
Thanks for the photo of the spring, needle and float. I did it after seeing the close up photo. The carburetor is back on. All I have left to do is slow speed needle, choke and hook up fuel line. Have you posted something about turning the carburetor? You mentioned something about that.
You can somewhat set the low idle screw/needle in the barrel, but it is best done under load on the boat in the water.
Here are some instruction on how the accomplished setting the low speed needle with a fix jet high speed carburetor.
Make sure these are your beginning carburetor settings:
Facing the carburetor you will notice slow speed and idle knob.
- Top needle is your slow idle needle. You will gently turn in (clockwise) until the needle is gently seated..please don't force. Once seated, you will turn out (counter clockwise) the slow idle needle 1 1/2 turns. Leave it there for the time being.
- You do not have a high speed needle. You have fix high speed jet. No adjustment necessary.
Carburetor Adjustment
Initial setting is: Slow speed = seat gently(turn in clockwise), then open 1-1/2 turns(turn out counter clockwise). Do not tighten or force the slow idle needle shut or it may damage the needle.
Start engine and set the rpms to where it just stays running by turning the tiller grip toward slow until it almost starts to sputter. In segments of 1/8 turns, start to turn the S/S needle valve in (clockwise). Wait a few seconds (10 to 15 sec) for the engine to respond. As you turn the valve in(clockwise), the rpms will increase. Lower the rpms again (turn your throttle slightly slower) 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 (sounds like a mild backfire). At that point, back out(turn out counter clockwise) the S/S valve 1/4 turn. Within that 1/4 turn, you'll find the smoothest slow speed setting.
When you have finished the above adjustment, 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. Don't forget to snug tight your compression nut on your slow speed needle to prevent it from easily being mal-adjusted unintentionally.
Thanks for making this video. It has helped a lot .
Nice work on the series of videos! Well done
Hey, Your videos are great. I got a 1969 evinrude 6 hp that wouldn't run. Followed a bunch of your video and I'm happy to say the motor is running great. I'm taking it trout fishing on the weekend.
Barry, thanks for the kind words. I'm glad the videos were able to help. Cheers buddy!!
Thanks for the videos. The cam follower was the hardest for me... Kept dropping the washer :)
You did great. Thank you!
Thanks for a great video.
I just found a boat that uses this motor as an in board and was wondering if this engine is water cooled? There is nothing on my engine that resembles any kind of water pump so I'm curious.
Thanks for the video. Any advice on setting the carb ? I have set it to the 1 and 1/2 turns and I can't get it to start.