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    Johnson 70 hp 1979 compression

    Took a compression test today, Top cyl 65psi mid and bottom cyl both 95psi. Suspect a ring or scored wall in the top. The book dose not say what the compression should be. What do you think? Open for sugestion.
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    Hard starting 1979, Johnson 70 hp, 3cyl.

    While fishing Florida saltwater in March, my 70 hp johnson became slugish at start up. Flushed out after our last fishing day and returned to Indiana. I had not started it till 1st of June. last weekend started to go fishing here and the motor would not crank with the starter. I had to...
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    1972 65hp Rude Is It worth the trouble?

    Just looked at a 72 65hp rude. The push button control unit is a mess. No side plates key switch busted, toggle switch gone, don't know where the other wires go, but the motor and body hardly looks used. Alot of parts look to be "unavailable." I have searched this collection of threads on repair...
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    Up Grade wheel hubs, Springs on old trailer

    Here it is. I have an old trailer, maybe 1969, make and model unknown. Broke a spring hanger returning from a saltwater trip. Smashed the bearings when the tire blew, but I always carry spare bearings. I managed to McGiver it back together and now am having trouble finding parts. I 've looked at...
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    hp70 1980 backfire won't start now

    We put the 70 hp1980 in the water the other day and started right off. It ran for about 2 min. and died, Fired and up and ran for another 2 min, but won't start now. Found a bad rectifier with ohm's test, and replaced it, stater measured good on ohms test, but the sensor coil resistance test...
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    70 Hp 1980 won't start now

    Had trouble running, lose of power, back firing, time to do and over haul any way. Water pump was worn out, broken bolt here, fuel pump old. Checked the timer base ohms, one leg was dead, the B-D combo. So , I ve done all the work and replaced the timer base, cleaned carbs,new water pump, all...
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    Bolt lube, Anti-seize anyone?

    Now that I've bought new bolts to replace the ones that I broke off while taking the lower unit off my J70, do any of you have a thought on the use of Anti-seize. I use a lot of it at work, doing pipe fitting work in a chemical plant. I know there is a problem with mixing copper based A-S and...
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    Looking for a Test Wheel

    I have a 1980 J70ELCSA, I'm am having a hard time finding a test wheel for it. I have checked E-Bay but no luck yet. Dose any one know where to find one.
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    Whers the water going?

    I'm doing some long needed maintenance on my 1980 J70ELCSA. Just removed the lower unit. I have seen water coming out several locations on the outboard while I am flushing it. First in the front of the exhaust housing near where exhaust housing bolts to the lower unit. 2nd, a hole in the lower...
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    Lower unit housing crack

    I have discovered a crack in the lower unit housing of my 1980 J70ELCSA. It is in the thin rear vertical portion above the gear case and the prop. I found it while flushing the motor at the end of vacation. Water was flushing through this vertical crack in the casting. I do not see any water in...
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    Need a new strater on a J70ELCSA

    The original starter is a Prestolite MGD4115 12V with a spring gear bendix with a 9 tooth gear<br />I have a choice that I have found at: www.iShopMarine.com<br />a SIE-185635 that is like mine and requires a special order, or a S2065M with a 2pc.rubber drive.<br />My question is are the to...
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    Tach & Timing lite

    I'd like to check out timing on my motor.<br />Where can I get the right gear for my Johnson 1980/70
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    Stalling When I put it in gear

    Great site! I searched this site last night about this subject and found some info, but spark plug gap at 0.30 stood out. I have a 1980 J70ELCSA,3 cyl, it has a long history of stalling after I leave the dock. It is second hand and I have no service history so I'm doing some rework myself...
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