switch f100 power head to f115?

sorry, my original post had (f150) instead of f115.


I have a 2000 f100 4 stroke that needs internal motor work done $$$$.

I have come across a 2000 f115 4 stroke power head that is likely ok but most of the extras outside the block are missing(carbs, intake , electrical harness and more) ect..(was a police theft/vandalism recovery)

1st, is it possible to switch power heads? remove f100 power head and replace with a f115?.

2nd, would the extras outside of the f100 case be switchable to the f115?
in order to get the f115 running ?.

[boats.net]

The powerhead might bolt up but the F115 is fuel injected and would need all fuel and ignition components for F115 to make work.

[Searider]

I know this thread is 4 years old but I have a question here .
If the current issue with my F100 and the crankcase pressure cannot be solved with easy measures I am in trouble .
I am German but work for many years in Ukraine where I also have since 6 years the boat with the Yamaha .
There are dealers here and they are good to sell you something new but none of them is capable to perform repairs on good level and I know what I am talking about .
To get the power head to Germany and back is also not an option cause of custom regulations ..
So back to this thread - a colleague sells his F115 injection motor which I almost bought last year but found out last moment that it is a ultra long shaft motor while I need just a long shaft .
My question - I can really swap the F100 block with an F115 block ??
At least the lower block gasket and a few other parts are the same .
The lower / upper cowling is different - so it needs to be changed as well .
At the end I suppose to have a F115 power head sitting on a F100 lower case - right ?
i guess The slightly different gear ratio + the higher hp can be compensated with a bigger prop .
Can somebody advice ?
This sounds crazy but would be much faster than any attempt to repair the F100 if needed .
Even for parts we are waiting here for 1 month which includes the delivery from Belgium central warehouse + the custom clearance and the delivery to the final destination ...
Once the parts would be here the short boating season is over
Cheers