Block on V-6 2.0L

[powrguy]

I have found that the external parts for a Mariner/Mercury 150HP 2.0L powerhead are interchangeable to the 2.0, 2.4, and 2.5 on this forum. My NEW question is:

I have a 150HP 1985 block (minus all externals, it's complete minus all externals and is was a carbureated engine). Would this 2.0L block be useable as a replacement for a 1996 150HP Merc block? I don't know if the EFI block is the same as a carbureated (1996 lists both types of fuel management), but my guess is that the intake manifold and fuel system components determine the EFI or carbureated type, and the block MIGHT be interchangeable.

thanks

 

[Dukedog]

Re: Block on V-6 2.0L

First problem is if your talkin' about useing tha efi from tha '96 it won't work on tha 2.0 block cause its probably a vertical reed motor. This limits you ta carbs and all tha linkage, cam and throttle arm barrel nuts. Tha next problem area is gonna be tha chargin' system. Here your gonna run ito a problem with coils and regulators on where and how to mount them. With tha earlier (9 or 16 amp) motor coil cups that would be solved. You can fab a plate to mount tha regs or find a ProMax mounting plate. Its really not that hard to do these things with a little help from this board but I think you will be dissapointed in tha difference in tha performance. Tha 2.5 efi performance is sooooooo much better tha tha 2.0 especially on a bigger boat..................

Just a few things I can think of off tha top of tha noggin'...........

 

[Faztbullet]

Re: Block on V-6 2.0L

Dukedog pretty much covered it, the 1996 150 (Efi or Xr6) is a 2.5 block and your is 2 liter. Unless you got a custom ECU to run it on a 2 liter if would run way to rich(got the tee shirt:redface and you woud have to rejet carbs. I myself installed a Xri unit on a 2 liter for my Bullet and it ran but not good as to rich.

 

[powrguy]

Re: Block on V-6 2.0L

First problem is if your talkin' about useing tha efi from tha '96 it won't work on tha 2.0 block cause its probably a vertical reed motor. This limits you ta carbs and all tha linkage, cam and throttle arm barrel nuts. Tha next problem area is gonna be tha chargin' system. Here your gonna run ito a problem with coils and regulators on where and how to mount them. With tha earlier (9 or 16 amp) motor coil cups that would be solved. You can fab a plate to mount tha regs or find a ProMax mounting plate. Its really not that hard to do these things with a little help from this board but I think you will be dissapointed in tha difference in tha performance. Tha 2.5 efi performance is sooooooo much better tha tha 2.0 especially on a bigger boat..................

Just a few things I can think of off tha top of tha noggin'...........

Okay; I''m not trying to convert the 2.0 to EFI, I'm trying to find out if the 2.0L block can be used to REPLACE the 2.4L block on a blown motor, and the 2.4L block is carbureated. Can the block be a direct swap, using all the 2.4L components from the blown motor? To be clear, the 1996 motor is blown; can the 2.0L block assembly just be swapped, using all the 1996 components on the 1985 replacement block?

 

[Dukedog]

Re: Block on V-6 2.0L

A little confused here.
You have an '85 2.0 rotating assy, right?
You have a blown '96 150 carb, right? Is it a 2.0?
What is tha 2.4? Or, are you callin' tha '96 a 2.4 motor?

One thing I will add if I'm figuring this out is that if tha '96 is a carburated 150 it is gonna be a 2.0 motor unless its tha XR6. Which I don't think is are you would have said so. That being tha case heres what your gonna run into.

First tha '85 has tha vertical front half. You will need a vert. reed plate and ALL throttle linkage that is associated with it. Your carbs from tha '96 will work.
Or you can change tha '85 front half to a horzontial front half and reed plate and all tha '96 linkage will work along with tha carbs. Tha horz. front from tha '96 WILL NOT work on tha '85. You would need ta find a horz. front and reed plate from a pre '90/'91 motor. Doing this will let you use all tha throttle linkage from tha '96.

Now either way your still gonna run into tha coil/reg stuff mentioned above.
Other than all this above it will bolt right on
Good luck with it.......................

 

[powrguy]

Re: Block on V-6 2.0L

A little confused here.
You have an '85 2.0 rotating assy, right?
You have a blown '96 150 carb, right? Is it a 2.0?
What is tha 2.4? Or, are you callin' tha '96 a 2.4 motor?

One thing I will add if I'm figuring this out is that if tha '96 is a carburated 150 it is gonna be a 2.0 motor unless its tha XR6.

I think you got it; the 1996 is probably the 2.0 motor, as it was a carb'ed model. I think the EFI model is the 2.5L, right (1996) if I'm reading you right.

So I am trying to REPLACE a 1996 rotating assembly with a real good 1985 rotating assembly, where BOTH motors are carb motors.

I'm okay and all bolt-on's/externals are the same, right?

 

[Dukedog]

Re: Block on V-6 2.0L

See my edit above...............

 

[powrguy]

Re: Block on V-6 2.0L

See my edit above...............

Okay; I hope I understand now. BOTH motors (1996 and 1985) were/are carb motors, which means BOTH are 2.0L motors. That said, ALL the externals will bolt on to the 1985 block assembly FROM the 1996 2.0L blown motor. I don't have an XRI/EFI motor at all in the mix, and the carb motors are the same block?

 

[Dukedog]

Re: Block on V-6 2.0L

Does tha '85 have a reed plate on it? It a vertical or horizontal?

 

[powrguy]

Re: Block on V-6 2.0L

Does tha '85 have a reed plate on it? It a vertical or horizontal?

The 1985 had a reed plate on it, which is the one where there are 6 reed blocks, three in-line in two rows.....I don't know if you call that vertical or horizontal, but I would guess vertical. I've seen the other type that has them in a zig-zag pattern, but the reeds on my intake manifold (reed block plate?) run parallel to the cylinder heads, 3-in-a-row down each side of it.

 

[Dukedog]

Re: Block on V-6 2.0L

Heres an idea. Make a list of EVERYTHING you need ta use from tha '96.......
Post it up and we can go item by item.

 

[powrguy]

Re: Block on V-6 2.0L

Heres an idea. Make a list of EVERYTHING you need ta use from tha '96.......
Post it up and we can go item by item.

LOL...I'm sorry. I just wanted to make sure that the block would be a clean/easy swap, and re-use all the parts from the 1996. I didn't want to write a book on it.

sorry....thanks for all the input.

 

[Dukedog]

Re: Block on V-6 2.0L

Thats vertical and since it has tha reed plate your carbs will work but your still gonna need All tha throttle linkage stuff from a vertical reed motor. Tha '96 stuff won't work...............so no its not a simple bolt on swap.

 

[Faztbullet]

Re: Block on V-6 2.0L

Ok let get simple with this... All 2.0 motors(150/175) 1985 and earlier had vertical reeds (3 inline above each other) The 2.4 and 2.5 had horizontal intake(zig-zag). For you to use this powerhead(2.0) you will need to swap the front crankcase half(zig-zag) over to the 2.0 block so the 1996 carbs and intake will bolt up,swap the rear exhaust plate & cover so you can use the newer style charging system and rejet the carbs(smaller).

 

[powrguy]

Re: Block on V-6 2.0L

Thats vertical and since it has tha reed plate your carbs will work but your still gonna need All tha throttle linkage stuff from a vertical reed motor. Tha '96 stuff won't work...............

Okay, thanks!

 

[Dukedog]

Re: Block on V-6 2.0L

Ok let get simple with this... All 2.0 motors(150/175) 1985 and earlier had vertical reeds (3 inline above each other) The 2.4 and 2.5 had horizontal intake(zig-zag). For you to use this powerhead(2.0) you will need to swap the front crankcase half(zig-zag) over to the 2.0 block so the 1996 carbs and intake will bolt up,swap the rear exhaust plate & cover so you can use the newer style charging system and rejet the carbs(smaller).

Your forgettin' one thing. Tha '96 is a 2.5 style block even if it is a 2 liter. Neither tha front half or tha divider plate will bolt up to tha '85...........

 

[powrguy]

Re: Block on V-6 2.0L

Your forgettin' one thing. Tha '96 is a 2.5 style block even if it is a 2 liter. Neither tha front half or tha divider plate will bolt up to tha '85...........

Thanks. I gotcha. Better to find a similar block than go through all the changes to make it work, I think. The 85 rotating assembly is in such good shape, though, that I thought it was sure gonna be easier than that.

2.0 just means the bore/stroke is the same, I guess, and it's a different block altogether in the 1996 vs. the 1985.

 

[Dukedog]

Re: Block on V-6 2.0L

...........Good luck whichever way ya go.

 

[sschefer]

Re: Block on V-6 2.0L

Does tha '85 have a reed plate on it? It a vertical or horizontal?

Pretty sure they went horizontal in 88-89. I think the 85 has that small center main too so I don't believe you can swap the front half either. I'd hold off and watch eBay for a newer short block so you can use your newer heads too.

 

[Dukedog]

Re: Block on V-6 2.0L

Pretty sure they went horizontal in 88-89. I think the 85 has that small center main too so I don't believe you can swap the front half either.

Was '89. Your late and waaaay behind on this thread.................