1991 johnson 150hp starting problem

[lakeshetek]

I have started my motor at least 50 times this spring. 4 times it wouldn't start. Each time it happened after the engine has run and then is shut off for 10 to 30 minutes. After turning the motor over repeatingly, I wait 45 min. or more and it will start again. It acts like it is flooded. I took the plugs out and they were wet. If it flooding, what has to be done?

 

[Dhadley]

Re: 1991 johnson 150hp starting problem

Welcome!!<br /><br />Waht spark plugs are you using? How old is the fuel?

 

[lakeshetek]

Re: 1991 johnson 150hp starting problem

NGK - BZ7HS 10; I had the problem before and after I put them in. The gas is recent , but it has ethenal and it is 89 octane. Maybe that's the problem.

 

[Dhadley]

Re: 1991 johnson 150hp starting problem

First of all lets get the right plugs in it. I use the Champion QL77JC4 in my 60* looper. Lets start there. Then, if the fuel is over 45 days old we need to get rid of that and start over. 87 octane is fine.

 

[lakeshetek]

Re: 1991 johnson 150hp starting problem

Thanks for the info..I'll change plugs.One other thing that I just thought of, does the type of 2 cycle oil make a difference?

 

[Nemo3395]

Re: 1991 johnson 150hp starting problem

lakeshetek- If you find the cause of your problem, I would appreciate if you would post it. I have a 1991 Evinrude 40 hp, two stroke that is doing the same thing. I have already tried the above remedies. Thanks

 

[Dhadley]

Re: 1991 johnson 150hp starting problem

As long as its a good TCWIII oil it should be OK. As far as protection goes even inferior oils shouldnt stop it from starting. Remember, motors used to run on 24:1 using 30 weight car oil. And those ignitions werent near as hot as what you have.<br /><br />Lets get the right plugs in it and fresh fuel and review the starting proceedure. If you even think the carbs need cleaning -- do it.

 

[randyearle]

Re: 1991 johnson 150hp starting problem

Originally posted by Nemo3395:<br /> lakeshetek- If you find the cause of your problem, I would appreciate if you would post it. I have a 1991 Evinrude 40 hp, two stroke that is doing the same thing. I have already tried the above remedies. Thanks

DID YOU EVER FIGURE THIS PROBLEM OUT. I HAVE THE EXACT SAME PROBLEM WITH A JOHNSON 150 OCEAN RUNNER. EACT SAME SYMPTOMS. Starts up and Runs fine, than I stop it for an hour or so and it wont start or make any noise other than beep warning at startup. Then 10 minutes later it starts fine.

 

[lakeshetek]

Re: 1991 johnson 150hp starting problem

I had my boat out yesterday and I think I figured out my problem. I think I have an air leak in my fuel line because my motor started if I pump the fuel bulb. The bulb never got hard, so I replaced it and it didn't make any difference. I assume I have a leak in the fuel line. Does this sound resonable and does anyone have any comments or advice?

 

[lakeshetek]

Re: 1991 johnson 150hp starting problem

I have replaced the gas line bulb, but it still won't pump up. I figure I have a gas leak. How do I find the leak? Does it have to be between the bulb and motor, or is it possible it is front of the gas line bulb? I need to find the problem because my motor still does't start when it loses its prime.