Quick and easy Merc Block question,,,,

[brokemerc]

I've fallen into a 1995 Bayliner Capri with a mercruiser 3.0,,, repair shop told the owner that the block was cracked (not sure if that's true or not) Anyway my question is this,, is there a difference between an automotive block and a marine block? I'm looking for a winter project and prefer autos but this boat really does look like new and I'm tempted to dive into getting it running again.. Thanks in advance.. Your site looks great..

 

[Windykid]

Re: Quick and easy Merc Block question,,,,

Welcome to I-Boats.

Yes they are different. If you want details search marine verse auto.

 

[tommays]

Re: Quick and easy Merc Block question,,,,

In the case of the 3.0 block it was Industral based(water pumps ect) so there is no auto =



Tommays

 

[John_S]

Re: Quick and easy Merc Block question,,,,

Not a 3.0 owner, but I believe that I have read a number of posts indicating this particular 3.0L block was not offered in a car or truck. I think it was said it was sold for industrial engines, such as generators.

PS: Looks like Tommays beat me to the gun!

 

[Bondo]

Re: Quick and easy Merc Block question,,,,

Ayuh,..........

While Most I/O Engines are in fact Automotive based,.........

The 3.0l Isn't...........

 

[JustJason]

Re: Quick and easy Merc Block question,,,,

you could replace it with a 2.5.... but you'd be taking a bit of a downgrade on power... not much though. How big a boat?

 

[Bt Doctur]

Re: Quick and easy Merc Block question,,,,

Shame your not in the tristate area east coast, will be throwing one away cause it`s taking up room.

 

[brokemerc]

Re: Quick and easy Merc Block question,,,,

Wow thanks for all the input. I'm in Virginia Beach- headed to Upstate NY for Thanksgiving where in the tri state area are you?? Is the 2.5 an auto block? If so who's it made by? I believe it's a 18 foot.. Thanks for the info.

 

[Orioles2001]

Re: Quick and easy Merc Block question,,,,

no matter how many times this question is brought up, people still debate but here's the facts...
There is NO (none) automotive engine block for the 3.0L engine. You cannot "hunt down" a 3.0L engine block (let alone a 2.5L block 2 piece rear main seal that hasnt been made since 1989) at your local auto bone yard simply because it has NEVER been used in ANY (again, NONE) automotive application...EVER.
If you truly wish to waste your valuable time and money, go try installing the "iron duke" engine..that will work! lolololol


3.0L engine has always been a marine only engine occasionally also used in forklifts.

 

[Bondo]

Re: Quick and easy Merc Block question,,,,

Is the 2.5 an auto block? If so who's it made by?

Ayuh,.......

It's also a Chevy,+ Nope,.... Not Automotive.......

 

[imported_TheMan]

Re: Quick and easy Merc Block question,,,,

I don't really know anything about this topic, but you have me curious now.. The old Tech IV engine that I had in my 89 Grand Am didn't have the same 2.5L block as the 2.5L marine?

I'm hoping to sell my old 3.0L soon and am in N.C.

 

[Don S]

Re: Quick and easy Merc Block question,,,,

The old Tech IV engine that I had in my 89 Grand Am didn't have the same 2.5L block as the 2.5L marine?

NO!

 

[msd58]

Re: Quick and easy Merc Block question,,,,

I belive its the old Chevy II block mid 60's

 

[BAYLINER185]

Re: Quick and easy Merc Block question,,,,

Yep my aunts 68 Chevelle had the inline 6 cyliner engine.

Not sure what size it was but it looked exactly like my 4 banger I had in my boat 10 years ago except the 4 banger had 2 less cylinders. I bet that 6 would have been a better motor. The 4 banger was the same motor that was in the fiero 2m4 I beleive.

 

[msd58]

Re: Quick and easy Merc Block question,,,,

I've fallen into a 1995 Bayliner Capri with a mercruiser 3.0,,, repair shop told the owner that the block was cracked (not sure if that's true or not) Anyway my question is this,, is there a difference between an automotive block and a marine block? I'm looking for a winter project and prefer autos but this boat really does look like new and I'm tempted to dive into getting it running again.. Thanks in advance.. Your site looks great..

There are plenty of the 3.0 blocks available from a number of marine repower sources on the web. If you are looking for a project just get a short block. Should be a relatively easy project for if you are a wrench. Now Mercruiser even makes a one turn of the key-instant start version this engine, but that would expensive.

 

[JustinF]

Re: Quick and easy Merc Block question,,,,

I work at a Yale forklift dealer and I can confirm the above comment about this motor being used in forklifts. It IS in fact used in some of the late 1990 to early 2000's Yale forklifts (and probably many other brands). The only difference (per GM's website) between the industrial version short block and the marine version is the cam and the cam gear. The cam gear in the industrial version is aluminum (as opposed to fiber). This will allow it to handle more stress, but makes for a noisier engine.

From my research, this motor WAS used in the automotive world... kinda. Supposedly it was installed in the 67 - 71 Jeep CJ5A (the US Postal Service's transportation of choice). But I think it would be much easier to find an industrial version or a used marine version than one out of a Postal Service Jeep.

On a side note, I'm currently rebuilding one of these motors now for use in my boat, swapping over all the internals from my cracked block, to the forklift block and it appears that on the industrial version they even used the brass casting (freeze) plugs for better reliability. It's funny how for over a year now I've been trying to find a cheap 3.0L block and all I ever had to do was look in our warehouse and we had an old one sitting around that I ended up picking up for no $. SWEET!

 

[brokemerc]

Re: Quick and easy Merc Block question,,,,

Lucky you.. Yes I just actually went and looked at the boat,, it actually looks like new and was well maintained except for the owner getting shipped to Irac and he forgot to winterize it. I'm going to trade the guy a deer that I shot this morning for the boat, trailer, 2 fish finders and a trolling motor (one bullet for a boat, what a deal).. The mechanic that was working on the boat says he will sell me a new Jasper engine installed for $4,000.. As much as I would like a new engine finding a cheap one and doing some labor would make it much more fun and a great winter project... Anyone with a 3.0 let me know....

 

[JustJason]

Re: Quick and easy Merc Block question,,,,

2.5L is an auto block from the late 50's to mid to late 60's... it was in the chevy II's and a few others.

Err... there have been a bunch of chev/gm 2.5L's over the years but the one mentioned above is the block that merc used.