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    79 johnson 100TLR79S 100 HP lost compression and this is piston help ?

    Re: 79 johnson 100TLR79S 100 HP lost compression and this is piston help ? this is what happened first time then 8 hours after operation this one we are discussing now , I cleaned cylinder wall up real good ... but something is causing falure only in this cylinder and on exhaust side both times
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    79 johnson 100TLR79S 100 HP lost compression and this is piston help ?

    THis is a new piston about 8 hours operation can any one tell me what might have caused this ?
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    79 johnson 100TLR79S 100 HP compression spark & fuel

    I have just got through with a cylinder repair honed out , new piston / rings / bearing,s , this is #3 cylinder after I put back together and started it up after warm up I did a compression check and the 3 old cylinders are still 125psi and new cylinder is 110 psi kinda strange for it to be...
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    79 johnson 100TLR79S spark issues

    Here is the problem after a rebuild I am having spark issues , the problem is hard to find cause I have spark on all 4 cylinders then I loose spark on 2 & 4 then I have spark again took it to lake had spark on all 4 was running good then motor lost rpm and then it regained the rpm did this over...
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    79 100Hp Johnson compression

    Re: 79 100Hp Johnson compression pulled head and this is what I found , notice damage to piston at 8 oclock and a few scratches on cyclinder wall only one can grab a finger nail , can this be honed out ya think ? what might have caused ring failure like this just age ?
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    79 100Hp Johnson compression

    While pulling a tub yesterday , I noticed a loss of power , I pulled boat out of lake and put in on ears in drive way and found cylinder # 2 not pulling its load it had fire so did a compression test and it was low around 70 with all others around 135 , a week ago I had 135 on this one as well...
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    1979 Johnson 100 HP kill switch

    kill switch not working even put a wire to Neg side of battery and touched it to the black w/ yl strip boat side of the red connector , motor keep running , had to pull fuel line , , what could be the problem do those red connectors go bad ? also there is 2 black /w yellow strip on engine side...
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    1979 Johnson 100 HP ignition question

    Model J100TLR79S Having idle issues , so am checking everything , my question is when motor is running and I take any plug wire off starboard side engine has no effect at all take any plug wire off port side engine changes , checked for spark on starboard side and have good blue spark at 7/16 ...
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    1979 Johnson 100 HP carb question & magneto

    Motor is a J100TLR79S Having fuel issues carbs flooding , after pulling the plastic breather cover off exposing the carbs , I noticed while turning over the motor there was fuel coming out of a tiny port in the bottom right corner of the metal plate that is attached to both carbs if your facing...
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    1979 Johnson 100 HP quick start feature

    Model # is J100TLR79S , Can you tell me if this motor has a quick start feature on it, and if so how do I disable it for some testing I want to preforme.. THanks in advance
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