Home › Forum › Ask A Member › Johnson 5.5 CD-13 carb issue. › Re: Johnson 5.5 CD-13 carb issue.
Well, the problem you describe could be caused by just about anything. Always start with the simplest basic stuff though.
I’m assuming you have checked compression, you advise the water pump seems to be working OK as well. Lets start with your fuel/oil supply, is it fresh this year? Have you checked the filter bowl for signs of water? The filter may be plugged also, even if it looks clean, you might try running it without the filter. Perhaps the pressure tank isn’t developing pressure or there is a leak in the pressure line. Try running the engine while pump the primer button, see if that helps.
The ignition system may look OK, doesn’t mean it is. You might try checking for spark when the engine quits and won’t restart, it should be able to jump a 1/4" gap.
I guess I have skipped over the simplest of solutions though, you may want to try a new set of plugs, even if your plugs are new, doesn’t mean they are any good.