Rebuild cost on a 4.0 Whipple?

[Boat 405]

Any ideas for cost on a rebuild? 200 hours on the unit.

 

[Don Johnson]

200 hours is nothing for that unit unless there is something wrong or something went thru it.... Change the oil and you should be good. At 200 hours if it is fuel injected would not be a bad idea to remove the injectors and have them cleaned/tested.