Merc 454 TPI work on 496 with no issues?
 

I just picked up a 1997 Baja 272 Islander with a 496 crate motor installed with a carb instead of the 454 TPI that was pulled out due to a cracked block. I asked why he went with the carb and he is simply an old school hot rodder that hates messing with fuel injection.

I would much prefer the fuel injection and I did receive all of the parts along with the old motor in the sale, so are there any reasons/complications to prevent me from putting the FI back on?

Thanks in advance!

1997 Baja 272 Islander
Bravo1 drive with 23p Mirage plus prop.

What intake and carb was used on the 496? Does the old FI setup look like this?

https://www.mercruiserparts.com/Show...+INTAKE+PLENUM

when you say crate motor,who bilt it.if it is a 8,1 L engine,the intake is completly different from a 454&502 engine.

Yes, that is the setup. It has an Edelbrock intake with an Edelbrock 700CFM carb. I'll have to check which version of manifold it is. It's not the Performer nor is it a tunnel ram, but somewhere in between. He did say that the carb was too small and an 800cfm would do the trick. The boat is in storage and the motor is in my garage, but it does look like everything should bolt up.

The 8.1 is completely different? I've built a few small block chevys, but the big blocks and marine engines are new animals to me.

It came off of ebay. Here's a link to what the motor most likely is. I'm still waiting for the paperwork from the previous owner.
http://www.ebay.com/itm/GM-8-1L-425h...47eb24&vxp=mtr

the engine in the ebay ad is a 8.1 L 496,the 454&502 intake is not interchangable.you should not have a problem finding a fi unit from a 8,1L engine,i sugest calling raylor,they specialize in the 8,1L engine.

Got it, thanks. I'll just throw a bigger carb on there until I build up another motor then.

The previous owner bought the boat at an auction and found water in the oil and a freeze plug pushed out. Just for fun does anyone care to hazard a guess as to whether the crack is indeed cracked, or that it simply pushed water past a seal? It's a MarkVI 4bolt main block.

the block and or heads are probibally cracked,any good machine shop can magnaflux them for you.

on a side note,a 850 carb on the 8,1 should make your boat run good,if i were you id put the bigger carb on it and enjoy the boat.

I don't believe Edelbrock ever made an intake for an 8.1L 496. Only Dart made one to use a carb.
It must be a 454 stroked if it is a 496.

Correct me if I'm wrong.

i was just on edelbrock,s site and could not find a manifold for thi 8,1 engine.maybe the op can post a pic of his engine

I'll swing by my storage later and get some pics and post them up. Be picked up the intake from Summit.

I was wrong on the motor. This is the unit here, a bored and stroked 454.

http://bit.ly/YrBnff

This being the case I guess my question would be is the FI a bolt up and go deal, or do you send the ECU out to get flashed like I do with motorcycles?

That re-man engine was built with Pro Comp components. All new for $3,999.99. You are going to have trouble.

RODS ARE BRAND NEW PRO-COMP
CRANKSHAFT IS BRAND NEW AIRCRAFT QUALITY PRO-COMP CAST STEEL
CYLINDER HEADS ARE NEW PRO-COMP ALUMINUM RECTANGLE PORT
ENGINE MAKES 576HP @5400RPM AND TORQUE IS 640LBS @4500 ALL DONE ON 91 OCTANE

Not a chance.

plus 1 ........................and thats all im saying!!!!!!!!!!!!!!!!!

Is it a fitment issue or bad parts?

ok me personally have run across a bad set of cylinder heads castings were thin and leaked water into the cylinders..from what i see from people is that they are not machined properly to spec..typical china parts..

Ah... Yea it looked like basically a cheap truck motor.