1975 johnson 70esl75e no more spark

[MWG2600]

hauled the old boat motor down from the back yard to remove the stuck lower unit and get it ready to sell or keep. strapped the motor between a tree and truck bumper with a come along The LU came off with a couple cranks! (after my dad got it in 1980 its been stuck) .


Now i oiled the cylinders, primed the fuel and it started right up....... for about 5-7 seconds, then died now has no spark.
Compression 140,145,140 . Need to know what to check now, the fuse is good, hot battery, just no spark.

I hope its something simple aka cheep!

 

[MWG2600]

Re: 1975 johnson 70esl75e no more spark

Anyone? i know someone has the order of what parts i need to test... Engine is on a stand not a boat, im concerned that i should stay away from my 9.9 motor so it dosant loose spark!

 

[boobie]

Re: 1975 johnson 70esl75e no more spark

Start with an OEM factory service manual. All trouble shooting procedures are in there and repair procedures also.

 

[durban]

Re: 1975 johnson 70esl75e no more spark

the very first place i would start with if you have no spark on all 3 plugs is the timer base , there are 4 wires that come from there . 1 for each coil & the black & white 1 is the earth ,witch goes on the opposite side of the power pack to the 3 wires on the bottom . chech for continuety with a meter

 

[hotshot123]

Re: 1975 johnson 70esl75e no more spark

i just went throught this with my 50 and it was the timer base

 

[MWG2600]

Re: 1975 johnson 70esl75e no more spark

check for continuety from under the flywheel to the other end of the wires on the timer base? Do the wires break under the wire cover?