User Tag List

Thanks Thanks:  0
Likes Likes:  0
Page 1 of 2 1 2 LastLast
Results 1 to 15 of 17
  1. #1
    Join Date
    Aug 2002
    Location
    Kansas City
    Posts
    524
    Thanks (Given)
    0
    Thanks (Received)
    4
    Likes (Given)
    3
    Likes (Received)
    2
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Question Mercury inline 6 interchangability?

    Hi,

    I've heard the bolt pattern is unique for my 1970 1350 however how unique is it? If I wanted to put a later model powerhead on it, what sort of changes would I need to do? I don't have a later model powerhead to compare with.

    Thanks for any and all help!

    Kirk

  2. #2
    Join Date
    Nov 2001
    Location
    South Carolina
    Posts
    2,595
    Thanks (Given)
    0
    Thanks (Received)
    0
    Likes (Given)
    0
    Likes (Received)
    1
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Totally different mid sections and powerheads. Just get a later model motor if that's what you want.
    Never argue with an idiot. They drag you down to their level, then beat you with experience.

    3 X APBA Formula V Nat'l Champion
    APBA Formula V US-1
    It took me 29 years to become an overnight success.

  3. #3
    Join Date
    Aug 2001
    Location
    Annapolis, MD ragboat capital of the world
    Posts
    11,463
    Thanks (Given)
    591
    Thanks (Received)
    164
    Likes (Given)
    2428
    Likes (Received)
    445
    Mentioned
    2 Post(s)
    Tagged
    3 Thread(s)
    Actually the bolt pattern is the same as the motors that preceeded the 135...the gasket pattern is different.

    The difference between the later (140& higher and related 115's) and earlier bolt patterns is one stud on the exhaust side (and maybe the one behind it). The other 6 studs are the same place they've been since 1956. If you are willing to risk running with 7 studs and nuts you can bolt them up.........the gaskets will not correctly match.....but isn't that why they make RTV?

    Jeff is right basically.....if the 135 gives up on you you are best off going for a whole late type 115, 140 or 150.

  4. #4
    Join Date
    Apr 2001
    Location
    Georgia
    Posts
    16,973
    Thanks (Given)
    2
    Thanks (Received)
    38
    Likes (Given)
    46
    Likes (Received)
    174
    Mentioned
    1 Post(s)
    Tagged
    7 Thread(s)
    Ew wee, I gotta add my 2 cents on that one. I've never tried sticking one on with two of the studs missing, because the exhaust isn't even close between the 71 and older stuff, and 72 1400 and everything else 73 and newer. The configuration is so different I don't think you could do it without major.......nevermind, it just won't work. The later mids are pretty plentiful and usually real cheap, even on E Bay, and the gearcases and cowl stuff all interchanges,

  5. #5
    Join Date
    Aug 2002
    Location
    Kansas City
    Posts
    524
    Thanks (Given)
    0
    Thanks (Received)
    4
    Likes (Given)
    3
    Likes (Received)
    2
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Hi,

    This is what I was afraid of! Oh well, live and learn I guess. Now I have two odd balls! My 1100SS is unique and so is my 1350SS! Just for the record, how does it compare to the 1400? Is it basically the same without the powerport in the cylinder? My parts list shows it identical to the same year 1150 except for the reed stop settings and carb diffusers.

    By the way, anyone ever put a small phillips screwdriver through their finger taking out the piston pin clips? Just before it slipped, the thought that this wasn't the smartest thing I've done went through my thick head.



    Thanks again and good night!

    Kirk

  6. #6
    Join Date
    Nov 2001
    Location
    South Carolina
    Posts
    2,595
    Thanks (Given)
    0
    Thanks (Received)
    0
    Likes (Given)
    0
    Likes (Received)
    1
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    KIRK! No I haven't put a phillips screwdriver through my hand. Only slotted screwdrivers.
    Never argue with an idiot. They drag you down to their level, then beat you with experience.

    3 X APBA Formula V Nat'l Champion
    APBA Formula V US-1
    It took me 29 years to become an overnight success.

  7. #7
    Join Date
    Apr 2001
    Location
    Georgia
    Posts
    16,973
    Thanks (Given)
    2
    Thanks (Received)
    38
    Likes (Given)
    46
    Likes (Received)
    174
    Mentioned
    1 Post(s)
    Tagged
    7 Thread(s)
    In 70 & 71 the 1350's and 1150's were identical except for the carb diffusers and reed stops. In 72, the 1400 was the only engine in the line with the new bolt pattern in the bottom of the block. The 72 1150 still had the old bolt pattern and was still the same as the 70/71's. The 1400 was identical to the 73 and foward 1500 with the exception of the power ported pistons. When the new 1500 came out, the port timing was different from that of the 1150's for the same years and the reed stops and diffusers became the same for both engines. It would surprise me to learn that any 1150 after 71 had the port timing the same as the higher horsepower engine of the same year, although I've never been inside an 1150 after a 71 until a 75.

    As far as the SS designation for the 1100, it distinguished it as having the new electronic ignition (SS = Solid State) This designation was not used on the 1350's. Many people now confuse the term with short shaft, but that's not what it was used for on the earlier engines. There were of course short and long shaft 1350's, just none designated SS.

  8. #8
    Join Date
    May 2001
    Location
    Scottsboro Alabama
    Posts
    706
    Thanks (Given)
    0
    Thanks (Received)
    0
    Likes (Given)
    6
    Likes (Received)
    1
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    2 other diff between 1350 and 1150, the ports on the 135's were as big as 150's , no power port though. the 1150 had much smaller and lower port timing. also the combustion chamber is tighter on a 1350 than any other in-line. a friend of mine discovered this when boring his. I cant remember how much diff it is but he said it was quite a bit.

  9. #9
    Join Date
    Apr 2001
    Location
    Georgia
    Posts
    16,973
    Thanks (Given)
    2
    Thanks (Received)
    38
    Likes (Given)
    46
    Likes (Received)
    174
    Mentioned
    1 Post(s)
    Tagged
    7 Thread(s)
    Stan, I've gotta disagree with you on that if you're referring to the same year model engines. The 1350 and 1150 powerheads were EXACTLY the same in 70 & 71 except for the reed stops and diffusers. The bare block is the same part number and Merc dealers regularly made the conversion from 1150's to 1350's back then. I believe that the 72 1150 shared this same configuration since it retained the old bolt pattern although the 1400 of that year had the new one. I think the 1150 changed port configuration in 73 when it got the new bolt pattern at the bottom, but again, I never got inside an 1150 again until a 75 model, but I'm pretty sure it took place in 73.

  10. #10
    Join Date
    Aug 2002
    Location
    Kansas City
    Posts
    524
    Thanks (Given)
    0
    Thanks (Received)
    4
    Likes (Given)
    3
    Likes (Received)
    2
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Great stuff! Learning a bunch about my motor! My engine has a red decal on the wraparound, did Mercury change the color when the 1400 took over? I have the opportunity to pickup another spare block and was told it came from a red banded 1150. Since I have the oddball exhaust configuration, I figure it can't hurt to have a spare. Is there a way to machine the power port into the older blocks or is it just not worth it?

    Thanks again!

    Kirk

  11. #11
    Join Date
    Nov 2001
    Location
    South Carolina
    Posts
    2,595
    Thanks (Given)
    0
    Thanks (Received)
    0
    Likes (Given)
    0
    Likes (Received)
    1
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    It can be done but I wouldn't bother. I have a 150 block that had porting added, basically a long slot. I haven't tried it yet. It was more common in the good ole days!
    Never argue with an idiot. They drag you down to their level, then beat you with experience.

    3 X APBA Formula V Nat'l Champion
    APBA Formula V US-1
    It took me 29 years to become an overnight success.

  12. #12
    Join Date
    Apr 2001
    Location
    Georgia
    Posts
    16,973
    Thanks (Given)
    2
    Thanks (Received)
    38
    Likes (Given)
    46
    Likes (Received)
    174
    Mentioned
    1 Post(s)
    Tagged
    7 Thread(s)
    Kirk, the 1400 had blue stickers as did all of the 72 motors. If the motor is truly a red stripe 1150 it would have the older bolt pattern and would be a suitable spare. If it was truly from a red motor, the powerhead would be silver and it'd have 2 fuel pumps on the side of the block. The silver block doesn't in itself define compatability. All 1500's and any other inline newer than 73 would be black though. Safest way is to look at the bolt pattern on the bottom.

  13. #13
    Join Date
    Aug 2002
    Location
    Kansas City
    Posts
    524
    Thanks (Given)
    0
    Thanks (Received)
    4
    Likes (Given)
    3
    Likes (Received)
    2
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Raceman,

    Thanks... Yeah, it has the two fuel pumps on the side and is the silver block. The price is right so if it has the odd bolt pattern, I'll pick it up. Kinda nice that Mercury used the same part for both motors and just made a couple little mods.

    I seem to like the old stuff!

    Kirk

  14. #14
    Join Date
    Aug 2002
    Location
    Cincinnati,OH
    Posts
    30
    Thanks (Given)
    0
    Thanks (Received)
    0
    Likes (Given)
    0
    Likes (Received)
    0
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Thumbs up yes good stuff

    Yes this all good stuff to learn since I have one of these old 1350 red line from 1970. No ss though.I am trying to pick some info on this engine and how to do things with it. It has been in storage for about 17 years and is very good shape. After taking the cover off I did notice that it looked very clean for being so old. It did have a new lower unit on it back in 85 with only 10 hours on it before storing it. I changed the oil and it did fire up ! Wow!
    Any thing else I need to know about this engine would help. I did buy an mercury cd for the parts diagram and part numbers and a got a mercury book on it. So anything else that I need to know here.BEsides where to find parts!
    Thanks to all,
    I am glade I joined this forum!

    Phillip Kastrup
    1966 Glastron v-163 SS Bayflite
    1970 Mercury 1350 135 hp.
    http://groups.yahoo.com/group/glastronboats

  15. #15
    Join Date
    Aug 2001
    Location
    Annapolis, MD ragboat capital of the world
    Posts
    11,463
    Thanks (Given)
    591
    Thanks (Received)
    164
    Likes (Given)
    2428
    Likes (Received)
    445
    Mentioned
    2 Post(s)
    Tagged
    3 Thread(s)
    Kirk, the 135 bolt pattern isn't ODD, it is just the earlier pattern. There are probably as many with the same gasket pattern as the 135 as with the newer bolt and gasket pattern.

    As for the bolt pattern remember it starts in 1956 with the Mark 75 and runs through the 135 in 1971; if either pattern is odd it is the 140/150 pattern.

Page 1 of 2 1 2 LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Aeromarine Research