The carb you have is a Holley 4010. It is the only marine Holley carb that has the single piece top plate. It's a relatively rare carb, and is no longer in production by Holley. The other Holley carb used on ski boats is the 4160. The 4010 is known for 2 things. First, it's known to to have slightly better throttle response than the 4160. Second, and most important, it is notorious for having warm start problems mimicking vapor lock. If its within your budget, go ahead and get a new 4160 rather than dumping money into a carb that is known to have problems.
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