Tuned 1977 Johnson 70hp 70el77s
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- čas přidán 6. 08. 2019
- Just bought a 69 Crestliner Runabout with finicky 1970 70hp Johnson outboard. It just took some cleaning and regreasing of all throttle and shifting linkages, then tuning in of warm-up lever and idle screw. Runs sweet now! See you at the Matoska boat launch!
Great video
the idle speed screw you are adjusting at 1:20 needs to be done in the water, with an accurate shop tach, and the throttle cable DISENGAGED or you will not get it to run with absolute consistency. Sure, you can get it close, but really the synch n link procedure needs to be followed in the correct order. this motor is so clean! thanks for the video love to see these old girls out there!
How do you do a link sync. I have the same motor and its running rough at wot. Thanks!
@@petersgarage6125 get factory service manual. its all in there.
@@petersgarage6125 factory service manual
The prop says 13 1/4 x 17 on it. It's got quite a bit of power.
The motor sounds nice!
Thanks James!
Runs well. Has a little gudgeon slap but thats normal for them.
What size prop you running, dia? Pitch?
Someone stole my prop, i just bought a new one 12.1/4× 15,have not tried it yet.
Hi, can you explain how you tuned it? Im having a hard time doing this in same motor
Don't forget to take apart the remote control box. The grease inside it can also cause reaction issues.
Yep. Thanks. I took that apart too and cleaned it a greased it.
I have a 70 horse johnson 1977 just replaced impeller.....am i supposed to see water coming out a certain p hole....because i didnt before and on new impeller and just dont wanna blow it up
Im having a hard time with finding a prop,mine was stolen, do you have numbers on your prop to give me not ghe size but factory serial # ? Thanks!
Lean
Seafoam causes quite the smoke show!
It revs nice now EY.
Sounds pean
I have a 75 model but no where near as clean as your motor. How did you go about cleaning it? Does the boat run well now? My boat doesn't rev out to 5500 rpm. Do you know what the problem could be?
I cleaned all the gummy throttle linkages with lacquer thinner, then used a Mercury brand marine grease to lubricate. Then everything moved smoothly.
Do you still have this boat I can't figure out where to put the throttle spirng. I'm going to rewatch your video
I do have the boat still, but it's a ways away from me and I can't remember where the spring is. Maybe try searching for an old manual for your throttle? You've probably already done that.
Can you tell me how to raise the idle
Is it normal for these things to piss from a hole out the back of the midsection instead of the actual telltale
Does the thermostat have to open before water comes out the two holes??
No, I don't believe so. The water will run through the engine and simply bypass the thermostat when closed.
John Wenzel should there be a lot of water coming out the two exhaust ports?
I don’t see any water coming out of your two ports, is that normal?
@@artbentley8594 If you have the earmuffs on the water intakes, then I adjusted the water pressure at my host spigot so the water isn't just flying out under the rubber earmuffs. So, then, the same amount of water will come out of the exhaust ports as you're putting in. You should have decent water flow, or engine could overheat. You don't want to run it too long like this just in case. Real engine repair guys use water tanks, and not the ear muffs. If you aren't getting much water coming out, maybe your earmuffs aren't snug. Are you sure you have the muffs over the intakes? I suppose there could be blockage?
@@artbentley8594 I know there was, but I'm having trouble seeing it in the video too. I'm not sure. I thought it was coming out in a few places? Can't remember. Maybe you've detected that I have an issue? I'll maybe check it out soon. Gotta get back to work. Thanks
I have same motor and having no spark issues ?? Any help???
Boy, it's been so long since I worked on that engine that I can't really be of much help. New plug, new plug wire,,, advance maybe...
Probably the stater,that controls the spark