Final answer:
The correct replacement for engine model 303442-0427A is the 303442-0427B. No replacement is available for the other engine models mentioned in the question.
Step-by-step explanation:
The correct replacement engine for the engine model 303442-0427A is the 303442-0427B. The engine model 303447-0110C and 305447-3078D are not suitable replacements. If there is no replacement available, the engine can be repaired with individual parts.