Is it the original Hardin motor?


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Serial number startsH20 and ends in 406 just wondering if it could be a 400 hp engine. And that would be fine  for me im new to the jet boat world.

It's most likely a standard 330 horse deal. That was the most common in those boat if its the original motor. The numbers in your pic are most likely machinist numbers which tells me its been rebuilt or gone thru at some point.

I have heard that there were also 405 hp  , 420hp , 435hp made in those days. The 405 hp came with 6 qt oil pan and the lower and higher hp engines where built 10 qt pans , the higher hp were  off shore boat engines.

PM me your email address I have a copy of the manual for all the motors they were building with specs ect


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  johnny@hillcrestcontracting.com  Thank you for your help.

Yes sir it did I saw that someone said 330 hp but it's looking more like 400/405hp oh well it runs dam good and gps at 55 mph throwing that sweet rooster  that's all that matters. Thank you again for your help.