250 heads?

[Salty Dog]

I have a 91 250 with a bad cylinder and picked up a 93 powerhead to put on. The heads on my 91 were newer and I would like to use them.

The 91 has the thermo switches in the heads and the 93 has the thermo switches in the t-stat covers.

Which ones should I use? How do I block off the unused ones?

Thanks

 

[rodboltw]

Re: 250 heads?

as they dont actually hit water there is no need for any blocking off, however CC the combustion chambers to insure the compression ratio wont change.

 

[Salty Dog]

Re: 250 heads?

Thanks rodbolt

Can you think of anything one there motors that won't interchange?

Also I am going to attempt the change the steering arm and shift rod.

 

[yamamarinetech40]

Re: 250 heads?

Umm...you going to use the shift rod of an even later model, right? So it'll be stainless(think '94 or '96 went stainless, can't remember which), but you'll know when you see it....

 

[Salty Dog]

Re: 250 heads?

Thanks

I'll definately find a stainless shift rod. From what I hear the hard part will be getting the 17 year old salty steering arm out after the powerhead comes off.