BF35 / BF40 Powerhead Interchangable?

[Cresco750]

Hello. I have a brand new BF35 powerhead complete with all electrics etc from approximately the late 1990’s. I’have the opportunity to buy a fire damaged but otherwise complete BF40 of age unknown but presumed to be mid-2000’s. I am still waiting for engine plate details to confirm actual age, etc.
i know this is question is a bit open-ended, but would the powerhead be intechangable amongst this series of Honda throughout the years?

many thanks in advance

 

[Cresco750]

I just heard back from the owner of the Outboard. Serial number is BAUJ-100147. Does this indicate that it is a 30hp and not a 40hp as advertised? I guess the power heads are not interchangable, nor would the lower unit ratios etc be compatible?

 

[Sea Rider]

If the 30 HP is a detuned version of the 40 with exact same CC powerhead would be possible, a matter to check both OB's tech specs to confirm that.

Happy Boating

 

[Cresco750]

Yes, and that is my question. From what I can gather, over the years Honda used the same basic powerhead on the 35hp, 40hp, 45hp, 50hp and 55hp motors, however the 25hp and 30hp used a smaller capacity engine. from what I can find on the web the serial number I’ve been given indicates that the engine in question is in fact only a 30hp Outboard and not the 40hp variant like the seller claims? Can anyone please confirm? The engine cowl is missing, hence the confusion.

thanks

 

[Sea Rider]

Posting some pics of both engines powerheads would help to determine if at least same if that's possible.. To determine correct HP is with serial number.

Happy Boating