New carb only way to go with that old fuel. Modern fuels go stale real quickly. But a 14 error code is for an engine overfrequency fault. This could be a failing fuel pump or the engine governor. I'd take it to a Cummins dealer for service. Do you have a manual?
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Lt Keefer
2018 Hurricane 29M
CHF, Saf-T-Plus, SumoSprings
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