1973 70 hp evinrude no spark

[woodpac]

70 hp it will have spark and then no spark need help plz!

 

[tashasdaddy]

Re: 1973 70 hp evinrude no spark

Welcome to i boats. history on the motor, did this just start? is motor new to you? dirty grounds or connections, all connections, stator or power pack. don't think both coils would go at the same time. here are some test, 6 pages, find you engine. http://www.boatpartstore.com/page28.asp

 

[woodpac]

Re: 1973 70 hp evinrude no spark

no is not new to me but it is a on going thing it

 

[tashasdaddy]

Re: 1973 70 hp evinrude no spark

really sounds like a loose or dirty connection, could be ignition switch, kill wires.

 

[woodpac]

Re: 1973 70 hp evinrude no spark

i read the pages 27-29 but i have no cap or points it is m# 70573b s#jooo4262

 

[BoatBuoy]

Re: 1973 70 hp evinrude no spark

Your engine is a '75, not a '73. Use the link TD supplied but try page 29.

 

[woodpac]

Re: 1973 70 hp evinrude no spark

i have no power to power pack key is on

 

[woodpac]

Re: 1973 70 hp evinrude no spark

did it need power? (key on)

 

[BoatBuoy]

Re: 1973 70 hp evinrude no spark

It doesn't need power to the power pak. It doesn't even need a battery. But it does need one to spin the starter motor, or hand crank it. It's simply a glorified magneto that uses a trigger coil and CD circuit to deliver a hotter spark.

 

[woodpac]

Re: 1973 70 hp evinrude no spark

just about to giveup and go to shop still no spark

 

[woodpac]

Re: 1973 70 hp evinrude no spark

is there a easy way to test power pack

 

[BoatBuoy]

Re: 1973 70 hp evinrude no spark

woodpac, you have to do what you have to do. The CD ignitions like yours that did away with points and condenser, although some would say they're more dependable, are much harder to diagnose. It takes some electrical test equipment that most folks don't have. I don't. On my last one, I got lucky. I suspected the powerpack and replaced it. That fixed it, but powerpacks can be an expensive experiment.

One last thing you can try - disconnect the main wiring harness at the large rubber plug on the engine. Then jump the solenoid and see if you have spark. If you do then there's a problem in the kill circuit to the controller. If you don't, I'm out of ideas. BTW, if you start it like this, you'll have to choke it with the manual choke, or pull the fuel line loose to get it to stop.