Merc. Promax 300 powerhead gasket

[carolina]

When I pulled the powerhead this is the gasket that was on it. Does anyone know if this is the right or wrong gasket it appears to be wrong to me. Thanks

[Chaz]

That's actually the better gasket from a 300x .
You'll only think it's wrong when you hear the price of that (*&%^^&**(( thing ...
If your going to use an aftermarket tuner , then you should probally get another one of those , if not the std 225 / 250 / early 300 gasket will work fine .

[vnemous]

The picture you posted looks like the 3.0 EFI gasket used on the 200-250 EFI and the 3.0 Opits. Only one is required and they are $85 MSRP part number is 832933006.

The 300x uses gasket 8329334 which is $23.97 MSRP and two are required to sandwich the lower pan. However I notice many people withwith X's, including myself, use two of the expensive gasket which according to mercury is not necessary.

[carolina]

thanks for the replies, this motor has the mad tuner. and also would this have anything to do with #6 connecting rod breaking?

[Chaz]

I know better than to argue with the guy I buy factory parts from ...

I should have said : It's a better gasket "for" a 300x instead of "from".

It's as clear as mud from Mercury ...

8329331 , 8329332 , 8329333 , 8329334 have been superseded to 8329335

The 3.2 and other late model opti's uses the 832933006

Aftermarket , like "Pro-Marine" makes it a little easier ..

Good 27-832

More Gooder 27-833

http://parts.promarineusa.com/produc.../30/210/1060/1

As you can see , the " Hi-Po" gasket has more meat around the exhaust ports are are generally considered to be longer lasting when using a aftermarket tuner which tends to run a little warmer .

Neither gasket will cause a broken rod on it's own . It would need to (perfect storm) blow out between the ex runner and water jacket and shoot enough water in #6 to hydro-lock the cyl . Not a real likely deal , and your gasket looks to be in good enough shape to not have that happen .
More times than not , the #5 or #6 piston will seize and the rod is not strong enough to just pull the motor to a stop . So it goes out of the side of the block ...

[vnemous]

More times than not , the #5 or #6 piston will seize and the rod is not strong enough to just pull the motor to a stop . So it goes out of the side of the block ...

Which Chaz can fix

[Chaz]

Thank you sir ...
Most of the time .. Yes
But , I have seen some that made me say :
You gotta be *&%$&&** kiddin me ...