70 hp Yamaha engine left on....won't start

[nsp]

I am looking at an engine that was left on the "on" setting (not running, but lights on). After replacing the battery, it still won't start. Do these engines have a fusible link or could the computer have fried from being left on?<br /><br />Thank you....

 

[nsp]

Re: 70 hp Yamaha engine left on....won't start

oh, I forgot to mention..the fuse in the red rubber fuse enclosure is good..it turns over but doesn't start...Is there a way to test the power pack?<br /><br />Thanx.....

 

[bigbrownbuku]

Re: 70 hp Yamaha engine left on....won't start

check that the safety lanyard is installed correctly. if it is try again with the main engine harness disconnected and jumping the starter solenoid.

 

[nsp]

Re: 70 hp Yamaha engine left on....won't start

Benc,<br /><br />Would I have to jump anything on the main engine harness (ie. the kills switch, ignition)?<br /><br />Thank you....

 

[ivar]

Re: 70 hp Yamaha engine left on....won't start

No, disconnecting the main harness bypasses the ign. key and kill switch. <br />Does it have spark?

 

[nsp]

Re: 70 hp Yamaha engine left on....won't start

Yes, there is spark...how would I shut the engine off if harness is disconnected?

 

[Ray Neudecker]

Re: 70 hp Yamaha engine left on....won't start

Choking it should kill it. Will have to do it manually though.

 

[bigbrownbuku]

Re: 70 hp Yamaha engine left on....won't start

plug the harness back in also will kill it if the ignition switch is off. how long was it left sitting with the key on?

 

[nsp]

Re: 70 hp Yamaha engine left on....won't start

Maybe a day or so? I have a deposit on a boat with this engine, the seller said it runs great...he and I came to an agreement on the price subject to hearing it run...Now, he can't get it running.

 

[Osprey]

Re: 70 hp Yamaha engine left on....won't start

Stick to your guns on getting it running before you buy. I had a 91 Yamaha 90 which I used to run all the fuel out of the carbs for storage and had mistaken left the ignition on several times over the years, even for multiple days and it had never causd a problem.

 

[nsp]

Re: 70 hp Yamaha engine left on....won't start

Turns out...dirty carbs ..what is with this Yami's and dirty carbs...<br /><br />Is there any part of the carb that is more prone to build up?<br /><br />For the past fews Yamaha's I have been taking everything apart inside the carb and spraying with carb cleaner...<br /><br />Is there a more scientific procedure....Nick

 

[Ray Neudecker]

Re: 70 hp Yamaha engine left on....won't start

Stripping them down,soaking over night and blowing out with air is my method.