mariner 175 with a old mercury block inside, Can anyone help me identify what engine

[tlwjkw]

...first chrome bore 2.4's were vertical reed engines. crankshaft rated horsepower then, rated at 200 horsepower. made 1978 thru 1982. great running engines in their day. after the 225 was produced for a couple years, they re-rated the advertised horsepower to propshaft horsepower. the 225 became the 200. the 200 became the 175. the 175 became the 150...

.. pretty much nailed it picture guy........ "0" 2.0 200's and i'm sticken to it!.........

'80, '81 225 was a seven then they went ta five and dropped tha rating ta 200......... first one i burned down.. wasn't watchin' water pressure.... had my hands full and way to loud ta hear tha wimpy azz buzzer....

do you remember when they changed ta clamp n trim?.. thinkin' '83/'84?... same time they did tha block?

[appolageticsoul]

...first chrome bore 2.4's were vertical reed engines. crankshaft rated horsepower then, rated at 200 horsepower. made 1978 thru 1982. great running engines in their day. after the 225 was produced for a couple years, they re-rated the advertised horsepower to propshaft horsepower. the 225 became the 200. the 200 became the 175. the 175 became the 150...

Sure does look like chrome bore thru scope.

[appolageticsoul]

Now that makes sense of it all... at least in my mind. Thanks.

-Peter

Yeah If you get on Buckshot racing 77, they show the early models were vertical reed. The parts diagrams show both reed packages as the 225 came with horizontals from the beginning. Most early model v200's were in fact vertical, crank rated hp so prolly closer to 165ish, It moves a 99 astro at 64mph on 26p 4blade stainless and 73mph on a 3blade turbo 14.25 x 24p

[FUJIMO]

...when new, they were 205 gross (powerhead) horsepower...

[appolageticsoul]

Well if you would like to see mine your welcome to. magnet doesnt pull to bore, the head stamps belong to v200 77-82, the carbs are wh3 also goto 77-82 v200, the block has the lower relief valve found on v200, Has vertical reeds.

[tlwjkw]

did ya find tha build date stamp???

[appolageticsoul]

did ya find tha build date stamp???

I have not Ive looked everywhere I do see numbers all over where halfs of blocks meet all over the place but none look like a date Theyre is a clearly clearly deep stamped big bold stamp 033B 9001 on the powerhead where its halves meet. as well as 01149 on the side top of halves. Neither come back to anything

[tlwjkw]

could be covered in paint.. sometimes tha dude doin' tha stampin' may have been a little hung over.. or jus plain weak that day.. will be the mo./day/yr.. 00/00/00............... probably at tha base of tha cylinder somewhere.. never seen one without it..

[appolageticsoul]

could be covered in paint.. sometimes tha dude doin' tha stampin' may have been a little hung over.. or jus plain weak that day.. will be the mo./day/yr.. 00/00/00............... probably at tha base of tha cylinder somewhere.. never seen one without it..

I will give it a good look again when it stops tsunami raining here but idk, I was told by a few that older 70s models sometimes didnt have dates or serial numbers on them, maybe it was just serial numbers all thou this big bold stamped 033B 9001 i would assume has to be something because its bold as **** on the lip of the two halves

[FUJIMO]

...original serial number is on the welch plug, on the top of the block, if its still the original block. could be painted over & need to be lightly sanded off, to see it. if the welch plug has no serial number on it, it very well could be a replacement block, either a warranty replacement block when still under warranty back when, or simply a new replacement service block that was replaced in the following couple of years after warranty was up, when that service shortblock was still available. replacement shortblocks were not uncommon, especially on severe duty salt water use motors...

[appolageticsoul]

...original serial number is on the welch plug, on the top of the block, if its still the original block. could be painted over & need to be lightly sanded off, to see it. if the welch plug has no serial number on it, it very well could be a replacement block, either a warranty replacement block when still under warranty back when, or simply a new replacement service block that was replaced in the following couple of years after warranty was up, when that service shortblock was still available. replacement shortblocks were not uncommon, especially on severe duty salt water use motors...

My welch plug if im seeing the right piece is small about the size of a quarter at best. It is just blank metal.

[pcrussell50]

I have not Ive looked everywhere I do see numbers all over where halfs of blocks meet all over the place but none look like a date Theyre is a clearly clearly deep stamped big bold stamp 033B 9001 on the powerhead where its halves meet. as well as 01149 on the side top of halves. Neither come back to anything

Hey mate, I'm away from my boats for a couple of days but when I get back to them, I'll try to get you some snaps of precisely where the month/year stamps are on this particular family of motors. I have BOTH 2.0/150 and 2.4/200.

​EDIT: Well looky here... I had some snaps of the date stamp on my 2.4/200 on my computer so here they are. On the block, just to the right of the upper timing arm and below the flywheel. 11 13 90 in my case. Hopefully this is helpful to you in finding yours:


-Peter

[appolageticsoul]

Hey mate, I'm away from my boats for a couple of days but when I get back to them, I'll try to get you some snaps of precisely where the month/year stamps are on this particular family of motors. I have BOTH 2.0/150 and 2.4/200.

​EDIT: Well looky here... I had some snaps of the date stamp on my 2.4/200 on my computer so here they are. On the block, just to the right of the upper timing arm and below the flywheel. 11 13 90 in my case. Hopefully this is helpful to you in finding yours:


-Peter

Unfortunately i dont have any markings theyre. I have taken pics of every marking i could find. The block seems to be stamped with designation UU but i cant find any info on that.

[skialot2]

I have an OG 175 V6 powerhead. The guy I got it from gave me the serial number from the clamp he took it off. But I lost the paper it was on. But I looked it up when I got it. The serial number started with a 4 and it came up as a 1976. The block has no numbers on it. Nothing on the block seams or next to them. It does not even have a welch plug at all.

[appolageticsoul]

Friggin mercury in the 70s, seems they did alot of mixmatched stuff and not much for consistency