What engine is this?

https://youtu.be/b70zDNfepxI?t=604

Sunken speed boat

Why, that's an AMC V8! Chrome valve covers like that typically would mean it's a 390, but they could have been swapped on from a 390.

Most of the early made Jet Boats had either 460 Fords or BB Chevy to power them.
That is not a BB Chevy
Living in SO CA and working on cars and boats since the mid 1960 I've never heard of any AMC motors used in any inboard/outboard or jet boats boat
I've been wrong more than twice

Is it really an AMC? I was thinking it was BOP motor

Amc

Buick is the only other engine I recall with the distributor angled to the left. It looks like a breather cap to the left of the distributor so I think it's an AMC?

Caddy engine do that too, the 472/500's anyway.

DAMN! Dunno how I forgot those! Mom used to drive Caddy's. Anyway, 368's and 425's as well. Still think this one's an AMC and AMC guy called it first.

AMC

Should fire right up by now

Your correct, a lot of the early jet boats had 455 C.I. Oldsmobile motors in them, shame on me for forgetting about them
Don't get old, you might lose some or all of your memory: whiney:
I did

A few donzi speed boats (creme de la creme) had 440 six packs. There was a yellow one in a town I use to live in, man it was beautiful and sounded killer. Those are the 71 hemi cuda of boats

Many years ago a coworker took me for a ride in his newly acquired jet boat. It had a 455 Olds motor and I was pretty fast from what I remember. Boat races in the local creeks were pretty popular back then.

"Don't get old, you might lose some or all of your memory
I did "


HAHAHA ! i resemble that remark Cab.

I have more trouble with my short term memory now. I still can remember a good bit of my older memories. Now what was I going to say??? LOL

AMC V8

There's a photo of an AMC 360 marine engine installed in a boat on this webpage:

https://www.wikiwand.com/en/AMC_V8_engine