A typical rebuilt midsize outboard motor from the 1980s to 2000 between 90 to 115 horsepower will cost at least $3,500 if purchased from a discount dealer; it will likely cost around $4,500 if purchased from a local full-service dealer. Rebuilding your engine will cost around $2,500.Click to see full answer. Similarly, it is asked, how much does it cost to rebuild an inboard boat engine?Having a shop rebuild your engine is usually less expensive than buying a reconditioned one. “I’d usually charge between $2,000 and $3,000 to rebuild a V-6 outboard powerhead,” Grannis reveals. “But if I ordered a reconditioned powerhead, it would end up around $3,000 to $4,000.”Also, how much does an engine rebuild cost? A typical engine rebuild is between $2,500 and $4,000 in parts and labor costs. This type of engine repair might include simply replacing bearings and seals, and obviously taking the engine out and re-installing it. It could be much higher too. Similarly one may ask, is it cheaper to rebuild an engine or replace it? Engine replacement is among the most expensive repairs in a vehicle, even when you rebuild it yourself. Many people would prefer to sell their car for parts and buy a new one or possibly donate it as a tax write off. Rebuilding an engine can take a lot of work in addition to a lot of money.How much does a new boat engine cost?Outboard motors can range from $110 to nearly $90,000 depending on power, make, model, and other factors.