recently purchased a 24 mach 1 magnum was told new motor by merc but i have my suspicions i am currently replacing the exhaust and can see there is blue paint under the black on the block it looks like original heads went back on there is a red reman plate stuck on it the casting number is 14015445 when i look this up it shows truck 1975 to 1987 4 bolt main does anybody have any ideas?

Sounds like you identified the block casting #? As far as what's inside, that's another story, who the hell knows.

There isn't more information on the reman tag, like who did it?

thanks for the reply
its a generic tag red silver band across the middle
with 721852 and stamped in lower left corner
#1227 thats it no name do you think the vin would help and how about blue paint on a chevy

Sounds like for sure the engine's been out, maybe somebody painted it blue who knows. I just had my 502 redone and it was black, then red, then black again, but had all the original parts in the lower end that would have been in an early 90's marine 502. (i.e. JE700 pistons 502 rods etc)

That tag is probably your only hope of sorting out whats inside, I don't claim to know how a re-manufacturer tags their engines -- try posting a picture of it.

Maybe someone can chime in with more information -- the casting # you posted was on the back of the block above the "transmission" correct? You can also try to get the casting # of the cylinder heads.

1401544 1975-87 454 4.250 4 bolt mains (casting number mayalso be 14015445)

numbers came from the back of the motor
thanks for the help
i guess it will be hard to know for sure without a tear down but it runs great i am leaving it basically stock except exhaust

You can also get the # off the intake manifold, and you can look up to see if you have the rectangle port or oval port, that would be good to know -- this assumes the intake matches the heads properly.

Good Luck!

It's usually the big noisy & thirsty things in the back...

WTF goddamnit, sonufa get it friggin' right it's: "thing(s)"

Not all of us can afford things, and we only have a thing back there

Sorry but I got two of them things in the boat and another three in the shop waiting to jump in so my system might be messed up...



Do you need another one?

If it comes with a 1000 gallons of gas I'll take! Well as long as it's free too