sank motor need advice

erikgibson

Cadet
Joined
Jul 23, 2009
Messages
9
I have a 1978 9.9 evinrude I sank and I need advice on how to get the water out of the engine. I thought I got it all out but when I crank it it fires but backstrokes. I was just wondering if its backstroking because of water still being in there or if there's something broke or bent in the engine? Everything is moving freely, nothing is stuck or making strange sounds so hopefully its just water still in the engine.
 

jbjennings

Captain
Joined
Jul 18, 2007
Messages
3,903
Re: sank motor need advice

Erik,
How long has it been since you sank it? Was it salt water?
When I sank mine one time, I took it home, blew the water out of the ignition with compressed air, took the plugs out and pulled it over a few times to clear the water out of the cylinders, cleaned the float bowl on the carb out, and blew some wD40 into the carb throat and sprayed some through the plug holes, too. I then let it sit for about 10 minutes, turned it over a few more times, cleaned and dried the spark plugs, reinstalled and cranked it up. I let it run in the tank for about 30 minutes to let the heat clear all the water out and let the fuel/oil mix lubricate the internals good.

I've never heard of one backstroking, and there are no valves to bend so I don't know what's going on there. Do you have your plug wires crossed?
I would try to crank it up as soon as possible, but if it's been over a day since you sank it, you could be looking at some corrosion problems.
Good luck,
JBJ
 

erikgibson

Cadet
Joined
Jul 23, 2009
Messages
9
Re: sank motor need advice

It was in freshwater. I sank it about 3 weeks ago, i may have the wire crossed since i just put a new power pack on it i will try that and get back to you
 

erikgibson

Cadet
Joined
Jul 23, 2009
Messages
9
Re: sank motor need advice

i just tried crossing the wires and it didnt even try to fire so i think my wires were hooked up correctly. i just cant imagine what it could be, I guess i'm going to have to break it down and see if there are any internal problems.
 

1946Zephyr

Vice Admiral
Joined
Oct 21, 2008
Messages
5,556
Re: sank motor need advice

anytime you sink a motor, it is best to get it running again ASAP It only takes minutes for rust to start setting in. Salt water even faster.:eek:
 
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