245 Carb Merc Parts Swap

**ttopping** · 01-11-2018, 09:31 PM

I don't have a 2.5 EFI horn front end to check this with, so I thought I would just ask!

-I have a 245 Carb and I have a EFI 2.4 Bridgeport(horn motor)

- Can I take the front of the crank case to the horn off the 2.4 and put it on the 2.5 for an injected motor?

- Will the electrics/ECM work on the 2.5, or do I need 260 Parts? Or did I just make a 260?

If anyone has tried this please let me know if it is possible!

Thanks
ttopp

**tlwjkw** · 01-11-2018, 09:44 PM

Originally Posted by ttopping

- Can I take the front of the crank case to the horn off the 2.4 and put it on the 2.5 for an injected motor?

Thanks
ttopp

No.......... different OD size center mains..

**ttopping** · 01-11-2018, 09:52 PM

Is there another spot to separate it off the Bridgeport that will work or this project is over!!
Thanks

**capteliminator** · 01-12-2018, 09:37 AM

Have read where Jeff Dunn has machined the 2.4 front half to fit the 2.5 small bearing stuff, but dont know that info first hand.

**tlwjkw** · 01-12-2018, 09:47 AM

Originally Posted by capteliminator

Have read where Jeff Dunn has machined the 2.4 front half to fit the 2.5 small bearing stuff, but dont know that info first hand.

saw a pic of it on fb.. aligned bored?.. looks like it takes a lot of "meat" away at case bolt holes?.. looked really thin.. cost efficient?.. donno?

**capteliminator** · 01-12-2018, 11:34 AM

Originally Posted by tlwjkw

saw a pic of it on fb.. aligned bored?.. looks like it takes a lot of "meat" away at case bolt holes?.. looked really thin.. cost efficient?.. donno?

Yeah im not sure either, just passing along the info. I assume with the difficulty of finding a small bearing 260 front half this would be another alternative, if it works!

**tlwjkw** · 01-12-2018, 11:43 AM

I've always had a hard time with usin' mis-matched case halves on real stem winder motors anyway.. jus can't see tha 2.4 to a 2.5 being worth a $hit for bein' very trustworthy for a bunch of expensive parts............ jmo.

**ttopping** · 01-12-2018, 06:30 PM

Thanks for the info....That's just what i wanted to know. I will keep my eyes open for a 260 front half

ttopp

**superboattwin250** · 01-12-2018, 07:12 PM

I have a 2.4 efi front half that Jeff Dunn modifed to fit a 2.5, the reed plate and horn with ecu bracket I would sell to you. Thanks mark

**ttopping** · 01-13-2018, 08:58 PM

if i put the horn you have or a horn from a 260 will it be a 260 or are there other differences in the block? I can understand the wiring harness will be different, but what else?