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  1. F

    70 hp dies at idle in gear

    Have had this problem ever since motor came out of shop after complete overhaul. Engine will not idle in gear. Have sync all carbs with ball gauge, linkage adjustment to cam adjusted. Timing set at 4 deg, ATDC, but idle only around 400 rpm and when put into gear chugs and dies every time...
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    Johnson 20hp dropping one cyl when warm

    I have a 82 20hp electric start tiller steer Johnson that drops a cylinder #2 after a couple of minutes,. no spark at all. Has new coils just wondering due to cost has anyone heard of a stator actually causing only one cylinder to drop out. I personally havent. I have heard of CDI box causing...
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    Enrichner schraider valve??

    Question can anyone tell me why on all enrichner valves if you unscrew the red cover over the manual on/off valve you will find a schrader valve just what is this used for. Nothing mentioned in any manuals I have on whey they are there??
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    78 Johnson SELL or PART OUT?

    Looking for a little advise from other technicians that have been around awhile. Have a 78 35hp Johnson that has a blown head gasket everything else ok. Question should I put the money into a head gasket thermostat and clean the carb and sell complete running engine. Or after seeing the price on...
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    To sell or part out Engine 35hp Johnson

    This is a general question for you technicians out there. I acquired a 1978 35hp Johnson outboard Model 35R78R, tiller steering and electic start, was not running and determined that really all that is wrong with engine is needs a new head gasket and thermostat, gasket blown between cylinders no...
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    25hp no start still problems

    Well Im back, not good news this motor is driving me crazy. So to review no start, good comp, weak spark, checked stator and trigger with ohm meter within specs, replaced plugs, replaced coils, replaced CDI unit, now have great spark great comp (130psi) both cyls, found when I installed the...
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    25hp Johnson back fire while cranking.

    Been having on going problem with this engine. Was a no start had weak spart, and pushing a lot of fuel out #1 cyl, figured that out now have good spark too both plugs, rebuilt carb, new leaf valves, new fuel pump, good compression (135) both cylinders. Now still no start and and while cranking...
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    Over fueling on only 1 cyl single carb system

    Just joined this form and looking for some advise: I have been a mechanic for over 40yrs, everything from gas,diesel, lp,NG, and electric. Certified Mercury stern drive mechanic but I am running into a problem I have never experienced in a small outboard. Working on a 1981 25hp Johnson...
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