Small Engine Troubleshooting Problems? Ask a Mechanic Now.
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It sounds like the carburetor jet is partially blocked which is not allowing enough fuel to pass through it when trying to run a full throttle. I would look at the carburetor jets. This engine may have a diaphragm style carburetor if it does the diaphragm may be bad and not pumping enough fuel to keep the engine running properly at high speed.
Can you tell me the model number of the engine that is on the outboard? I can better assist you with that information.
So it is not a surge then it is a miss fire that is created by the rev limiter. Does this happen when the engine is in the water and operating or only when out of the water. The rev limiter is designed to keep the engine from over speeding, if the engine has no load or not in the water then it could hit the rev limiter and cause the ignition to miss fire.
If it runs good when in the water then I wouldn't be too concerned about it. If it still cuts out or misses when in the water then I would be looking at the rev limiter as being an issue especially since you say that it runs okay with the limiter unplugged.
You are most likely hitting the rev limiter and activating it if the unit is not in the water.
Yes, if you have the unit out of the water the engine will hit the rev limiter at roughly about half throttle and start missing out. It will operate properly once you have it in the water.
It will be a small connector with three or four wires in it. When you unplug it you basically just disabled the rev limiter which will allow the engine run properly out of the water however it could allow the engine to over speed and throw the rod and cause major damage to the engine. You have to be very careful running the engine without the rev limiter connected or in the water.
I think that you will find that once you put this unit in the water your running issue will fix itself.
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Since you have not had it in the water I would suggest that you wait until you put it in the water and see how it performs then. The rev limiter is pretty expensive from what I see it can be around $65.00 for it, not a cheap part to have just in case.