1972 Mercury 1150

[fishdog4449]

hey guys
i came into possesion of a free 1972 merc 1150. my uncles friend bought a boat, already had a motor so he gave me this one. now, all he said it needs is a starter and carbs rebuilt. I'm going to build the "mother of all sawhorses" to put this thing on to work on it(its HEAVY). after i get the starter and carbs fixed, what else should I check before i try to fire it up??. the impeller was replaced a year ago
I think it would be easier to start it, then see how it runs as far as retiming it or anything. He said it ran like a top if it was tuned right (which it should its a inline6)
Also, it looks to me like it has a smaller prop than my Merc 80 thats on my boat now. Basically, about what size/pitch prop should be on this thing?
by spring when its running its going on my 17' Glassmaster
Had my little brother convinced it was a 1,150 horsepower motor for a while (it says 1150 on the front of the cowl lol)

 

[MercFan]

Re: 1972 Mercury 1150

i have a 70 1150. keep an eye out for my "big thank you", and "everything we did" post. Taking it out tommorrow, so I should make the post on Saturday 6 Oct 07 or Sunday 7 Oct 07.

 

[AMD Rules]

Re: 1972 Mercury 1150

There is a few things to check if it has been sitting idle for a while. Have a peek in the FAQ section for some examples. Typically they involve routine maintenance items to ensure it has a clean supply of fresh fuel (check the lines for deterioration), isnt running to lean/rich (clean the carbs), has adequate cooling (impeller), and has been adjusted for timing/sync to ensure maximum advance does not eat a piston. Check all wiring for any issues. Careful not to hook up battery cables backwards or short anything out which may damage the sensitive electrical system.

In regards to prop pitch, I'd expect you'll be aiming for 17P or 19P depending on how heavy that boat is.

Complete engine weighs about 300lbs. You will need a couple of friends, or a hoist to lift it.



.

 

[fishdog4449]

Re: 1972 Mercury 1150

The boat weighs about 1000lbs - 1500lbs (it was a gov't boat so it's pretty beefed up) The 80 has a 17x18P or 19P I think already and It has plenty of holeshot.
Yes, getting it off the truck was an adventure in itself. I think I will use a triple block and tackle attached to one of the garage trusses to hoist it onto the stand.
I haven't even opened the cowl yet, but I will keep posted.
Thanks for the pics, I think I will borrow your design for the stand. Is it sturdy enough to run the motor on?
I plan to make sure its running perfectly, or at least as perfect as I can tell on the 'muffs, before putting it on the boat.

 

[AMD Rules]

Re: 1972 Mercury 1150

That engine stand previously shown was meant to fold up when not in use. To mount the entire motor, I'd recommend two additional rigid supports to stiffen it up a bit, like this shown below on my '84 model.

For lifting, I use a 2 ton chainfall up to a header resting on multiple joists in my garage. Using an eyebolt on the flywheel makes it easy to do myself.





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[fishdog4449]

Re: 1972 Mercury 1150

I'm going to try to dublicate the one in your 3rd picture; looks like a good design just what I had in mind Thanks!!

 

[fishdog4449]

Re: 1972 Mercury 1150

That engine stand previously shown was meant to fold up when not in use. To mount the entire motor, I'd recommend two additional rigid supports to stiffen it up a bit, like this shown below on my '84 model.

For lifting, I use a 2 ton chainfall up to a header resting on multiple joists in my garage. Using an eyebolt on the flywheel makes it easy to do myself.





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I don't have an eyebolt; but I was going to use a few straps around the motor then attached to the block to lift it up.
We once lifted some 400 pound speaker cabinets the same way, so I figure a 350 lb motor will be fine.

 

[Chris1956]

Re: 1972 Mercury 1150

Dog, That motor has eight 5/16 bolts in a cluster around the flywheel nut. Remove two bolts, and use longer 5/16 fine thread bolts and washers to attach a piece of chain to the flywheel. Now you can hook the block and tackle to the chain.

 

[fishdog4449]

Re: 1972 Mercury 1150

Ok i got the motor on the stand successfully
i just got a few ppl over and lifted it onto the stand
Another question- the motor has a blue band wraparound cowl, but a red band front cover
is it supposed to be red band or blue (going to get new decals)

 

[AMD Rules]

Re: 1972 Mercury 1150

'72 is blue, but most prefer red anyways. You'll probably have an easier time finding a complete new wrap for it. Decals are no longer in production, and hard to find.

 

[fishdog4449]

Re: 1972 Mercury 1150

I might just go with red because the side decals are pretty faded anyway, but the front red cover is fine. I found a site where I can get OEM parts and the decals are available. I'll try to get some pictures up when I get her fixed up.
On another note, I find out i've been running on only 2 cylinders on my 80 all summer. Needs new coils and the ignition wires from the switchbox to the coils were corroded through. ...and I wondered why it seemed to be running rough lol