Telling difference between 5.0 and 5.7L (1999 era)

[gtochris]

Hi,
I'm looking at a 1999 boat with either a 5.0L or a 5.7L, the plastic cover that goes over the flame arrestor is missing so I'm a bit baffled if this is a 5.0 or 5.7? Is their any distinguishing marks or things to look at on the block? Also- Anyone know the various types of HP outputs from that era? I'm thinking it was simply 220 and 250 right?

Thanks.

 

[Bondo]

Re: Telling difference between 5.0 and 5.7L (1999 era)

Hi,
I'm looking at a 1999 boat with either a 5.0L or a 5.7L, the plastic cover that goes over the flame arrestor is missing so I'm a bit baffled if this is a 5.0 or 5.7? Is their any distinguishing marks or things to look at on the block? Also- Anyone know the various types of HP outputs from that era? I'm thinking it was simply 220 and 250 right?

Thanks.

Ayuh,.... The 5.0l, 'n the 5.7l are Exactly the same on the outside,...

The Numbers are the only way to tell,....
Either by the Merc serial numbers, or possibly the Castin' numbers on the block's aft flange, just aft of the portside head,...

 

[Fun Times]

Re: Telling difference between 5.0 and 5.7L (1999 era)

Carbureted or EFI? If carbed, You may get lucky with looking at the ignition control module, sometimes there is a white sticker with what engine size you have there.

Example: Mercruiser Vortec GM 5 0 5 7 350 ICM ECU PN 861253T02 | eBay

 

[gtochris]

Re: Telling difference between 5.0 and 5.7L (1999 era)

cool. Thanks. I'll probably source the correct black plastic Mercruiser Engine cover once the dust settles.
Any tips on what the EFI version looks like?

 

[MikDee]

Re: Telling difference between 5.0 and 5.7L (1999 era)

cool. Thanks. I'll probably source the correct black plastic Mercruiser Engine cover once the dust settles.
Any tips on what the EFI version looks like?

It don't have a carburetor.

 

[thumpar]

Re: Telling difference between 5.0 and 5.7L (1999 era)

The serial number would be the best way to tell what it is. Mine has the engine, drive and gimbal serial right on top of the engine. They should also have one down by the starter.