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What is the story on this engine, have you ever personally seen it make full power under a load?
Hi Ray. Got it. Out of curiosity what kind of spark tester did you use? Do you have a timing light to check spark that way?
Does the tester have an adjustable gap that you can adjust, or is it like one of those bulb style testers, like a regulator light bulb or a neon type of bulb?
Are you at sea level or at high altitude? Changing jets isn't something that's done unless you are bouncing between altitudes
Did the plugs have any mocha color to them, or did they look like white/almost new plugs?
Hi Ray. Just checking in. I never heard back from you. Do you still need help with this?
Did the plugs have any mocha color to them or do they look like new plugs?
When water gets into a cylinder it will flash to steam, and steam clean the inside of the cylinder, including the plugs inner insulators. This is what makes the plugs look like new. If all of the plugs are white, then you either have water in the fuel, and water is getting in that way. Or, the exhaust cover gasket is bad, and allowing water to get into the cylinders that way. The exhaust cover is the metal plate on the side of the motor that has something like 20+ bolts on it.
I don't know how you want to leave this but that is where you stand on your end and what needs to be checked. I think that should do it but I work for tips so I do want to make sure you are happy with my service before you go. If you had a further question on the issue by all means feel free to ask. If not, Just in case you do not understand the way the website works (and some folks do not). You do have to put forth a positive rating in order for it to credit me for helping you. When ratings are not done, the website simply keeps your deposit and they will not credit me. The ratings box is located at the top of the screen. To rate, you must select the star you wish and also confirm it. Please let me know if you run into any problems or errors when trying to do it. If you do have a problem, or if you can not see the ratings box which is at the top of the screen. Please reply back "I rate Jason's service _______" and fill in the blank.
Questions do not close out, so if you have to come back later on with follow up questions to the issue you still can even after doing a rating.
You are very welcome.
If that's the case then those carbs you got are either dirty, the wrong ones for the engine, or the right ones for the engine but they have the wrong jets in them.