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Ok...Thank you all for the suggestions. I have tested and corrected/replaced everything that has been suggested so far. I had it running like a top on the hose at home. Took it to the lake this weekend (94 deg) and it fired up and ran amazing for about 10 minutes. It then seemed to stumble...
It does have the thunderbolt IV ignition. I just assumed that I had spark because it would fire up every time but doe shortly after. Could that still be the TB4? It does have a new button and cap on it. I did order a new coil as well because the old one looks rough inside the connector. Thanks...
That’s true. I tore the carb apart to clean and rebuild and everything looked good. I didn’t see any water in the bowl or debris in the filter. I agree that it could just be the gas so I’m going to drain it and replace with new NE gas. I am also thinking that the fuel pump could be going bad...
Just picked up a 1988 mercruiser 5.0 in an old Thompson boat. Got it up and running in the driveway and everything seemed great. Took it to the lake yesterday and it fired right up and ran full tilt for about 15 min (after proper warm up). It stated to die and surge back to life a few times and...
