Can't find info

[lynnboy021]

When I order parts from my marine dealer they always ask me for the serial numbers but I can't never find any numbers.... I think I have a 88 Chevy omc 5.7 cuz I have the log exhausts but they always wants to make sure... I have no info on valve covers or top of the air filter.... so question is is there any more numbers I can look for that will tell me my motor info???

 

[bruceb58]

Re: Can't find info

Do you have an 88 Cobra? You dn't need the serial number, you need the model number

These are 1988 5.7L model numbers:

Model 574AMLGDP
Model 574APRGDP
Model 574BMLGDP
Model 574BPRGDP

 

[lynnboy021]

Re: Can't find info

Yes I have a cobra.... yes my dealer gave me them numbers but can't find it on my boat so should I just pick one??

 

[Howard Sterndrive]

Re: Can't find info

you can use this to determine which one of those best describes your power plant
OMC Model Guide 1986-1993

 

[lynnboy021]

Re: Can't find info

Do you have an 88 Cobra? You dn't need the serial number, you need the model number

These are 1988 5.7L model numbers:

Model 574AMLGDP
Model 574APRGDP
Model 574BMLGDP
Model 574BPRGDP

I see them numbers all have 574 but my motor does not have a 4 barrel????

 

[lynnboy021]

Re: Can't find info

so looks like my motor model number should be 572bprgde

 

[Howard Sterndrive]

Re: Can't find info

probably
502APRGDP 1988, then
likely a 305 (5.0L) motor if it has a 2 BBL

 

[lynnboy021]

Re: Can't find info

How do I know if I have a 305 or 350???

 

[Howard Sterndrive]

Re: Can't find info

only the 305 came with a 2 BBL, all 88 350s had 4 barrel carbs.

You can also look for a casting number on the block - the googles would probably lead you to a sbc chevy casting number guide somewhere

 

[lynnboy021]

Re: Can't find info

Well I was looking at pics of 305 and 350 and my motor setup points to 350.... I will look at Google and see where I can get the casting numbers

 

[Howard Sterndrive]

Re: Can't find info

my motor setup points to 350

Carb and intake probably the only visible difference. and if your setup is 2BBL, that pretty much says 305. But anything possible with 25 year old boats.

 

[lynnboy021]

Re: Can't find info

So the casting numbers I found is 14010201 and Google says it's a 1980 to 1985 and it's a 305 Cid.... so can I just make up a model number???

 

[Howard Sterndrive]

Re: Can't find info

502APRGDP will be your model number if the boat is a 1988

OMC tended to use GM parts that lagged the automotive line by a few years.

 

[lynnboy021]

Re: Can't find info

502APRGDP will be your model number if the boat is a 1988

OMC tended to use GM parts that lagged the automotive line by a few years.

thank you so much