1989 150 mecury black max XR2

[coryp]

I am overhauling this mercury 150 engine it is a 1989 and I have removed the head from the lower end and it is sitting in my garage... I need help on how to split the cases... we cannot get them to split we have tried everything and removed every bolt we can and it doesnt want to budge... any help will be greatly appreciated!!! thanks

 

[achris]

Re: 1989 150 mecury black max XR2

Do you have the Merc service manual? If not, may I suggest you get it...

Downloadable here... http://forums.iboats.com/showpost.php?p=2072211&postcount=3

 

[Faztbullet]

Re: 1989 150 mecury black max XR2

You should have 4 in upper end cap,4 in lower end cap, 8 on crankcase flange. and 6 on crankcase front under the intake manifold (must remove carbs and intake)

 

[Dukedog]

Re: 1989 150 mecury black max XR2

8 on crankcase flange. and 6 on crankcase front under the intake manifold (must remove carbs and intake)

Are you sure 'bout this?

 

[Faztbullet]

Re: 1989 150 mecury black max XR2

Ya got me, It was 5:00am!!!:redface: Let me clarify... There are 8 main bolts, 6 are under intake you cant see with carbs and intake installed

 

[coryp]

Re: 1989 150 mecury black max XR2

Ok got everything broken down.. it looks like there are sleeves in the cylinders... can I replace these if so how much are they and where do i get them???

 

[Faztbullet]

Re: 1989 150 mecury black max XR2

These are cast in sleeves and you can bore engine up to .060, if .060 wont clean it find another block as it is not worth resleeving.

 

[j_martin]

Re: 1989 150 mecury black max XR2

Are you sure it's a 2.0l (xr2) and not a 2.4l (xr4)

The same clamshell would fit them both. I think they went to XR4 in '88.

 

[Dukedog]

Re: 1989 150 mecury black max XR2

??? Tha 2 and tha 4 overlapped in '87 but no 2 after that. If its an '89 gotta be a XR4. Think '89 went ta "bucket" type cowl. Mighta been a mixed bag when tha change that year. Ya got a serial number?

After a little more "diggin'" they did have a few (very few) '88 XR2's escape.............

 

[j_martin]

Re: 1989 150 mecury black max XR2

My 88 XR4 is a 2.4 wid a clamshell cowl. I think the difference between them is XR2 is 2.0l, XR4 is 2.4l. XR6 is 2.5l. They are all strong 150's. XR2 and XR4 came with 4 1/4 in lowers. XR6 came with either 4 1/4 or 4 3/4 in lower. Cowls went from clamshell to bucket when the electrical system went from 16a to 40 amp wetback. (both XR4 and XR6)

If it's an 89, it ain't an XR2. If it's an XR2 it ain't an 89. Most of the parts interchange, so you might have to either pull a head, or take detailed pictures of the engine and pull some numbers off'n it, like carb model numbers so we can figure out what you got.

If yer lucky, it's an XR4 with an XR2 clamshell on it. Shave the heads, chit can the advance module and do a custom link n sync on it, maybe do some plug reading and re-jetting, and hang on fer the ride.

hope it helps
john

 

[coryp]

Re: 1989 150 mecury black max XR2

found out it is a 1987 mercury 150 black max xr2... what kind of place do i take this to to get it bored???