Cold start no go, Warm start just fine?

[mentalmarine]

I have a Johnson 1984 70hp engine that will not start cold. If I manually start it with the pull cord it starts up. It barely moves the crank when you try cold, but warm it goes quick and starts fine. After leting it warm up some say 10 minutes, then turn kill it and start it up, it starts up perfectly. What might be the cause of this?

 

[freddyray21]

Re: Cold start no go, Warm start just fine?

a low battery or a draggy starter, dirty connections on the battery and or starter post. If it starts fine with the pull rope it is not the motor.

 

[Barnacle_Bill]

Re: Cold start no go, Warm start just fine?

Have your battery load tested. While cleaning the lugs, look for signs of corrosion at the base of them. They can corrode inside where you can't see it.

 

[tashasdaddy]

Re: Cold start no go, Warm start just fine?

90% of starter problems are bad connections. remove and clean both ends of the battery cables, so that they are shiney, also the cable from the solenoid to starter. check for nicks in the cables. and make sure the connectors are on the wire good. the cable tend to corrode from the inside out, if nicked, corroded wires, and connections, heat up and cause resistance to the follow of electricity, thus the starter doesn't get enough. you can also take jumper cable pos battery post to large post on starter. with a good connection, the engine should spin. then if the starter is good clean everything and retest. then trouble shoot solenoid. starters can be rebuit at a starter/alternator shop, much cheaper than a new one.

also have the battery load tested at the auto parts store, free, i've had new batteries go bad