Purchased 1977 Mercury Thrunderbolt 1150 115 possible missing parts?

[Rob Maior]

Hello,
I have been reading posts on here for a while and the information is helpful. Im new to this site so I read a few things to get me by. Here goes nothing.
Yeaterday I bought a 1977 Mercury 1150 116 6cylinder compressions 122 all across. Fired right up and knowingly the motor had sat for last 2-3 years. The lower unit was removed and sitting off the side. I noted that there was no water tube in mid section to hook up garden hose to test the motor... I then noted that the impeller was just sitting on the long shaft with no casing. water pump pasing. I think these are relative small discrepancies and cheap parts... my question is...How can I make 100% I know if additional pieces are missing or broken? what should I be on a keen look out.
Thanks in advance...

 

[merc850]

Re: Purchased 1977 Mercury Thrunderbolt 1150 115 possible missing parts?

Here's a view of the lower unit parts.

 

[Chris1956]

Re: Purchased 1977 Mercury Thrunderbolt 1150 115 possible missing parts?

I would recommend you get on the crowleymarine.com website and look up the exploded parts diaghrams. Motor should have an exhaust megaphone next to the waterpump, upper shift rod etc. Check the gearcase for water. Waterpump parts are cheap and avail. Other stuff is not avail, so it you need something, look for a junkyard, or ask around this forum.

 

[Rob Maior]

Re: Purchased 1977 Mercury Thrunderbolt 1150 115 possible missing parts?

Thanks for the pic. I'm going to buy a service manual for it so it should also come in handy. Yeah I know I'm missing the copper water tube and apparently they arent very easy to come by. So at this point I would need dimensions so i can locally manufacture my own.

 

[waynelk]

Re: Purchased 1977 Mercury Thrunderbolt 1150 115 possible missing parts?

One can be made from a piece of 1/2 inch hard copper tubing if you can't find one. You need to know the length though since yours is missing.

 

[Chris1956]

Re: Purchased 1977 Mercury Thrunderbolt 1150 115 possible missing parts?

Waterpipe is 1/2" copper, standard plumbers stuff, except is has a custom bend... I would look for a used on since they almostr never wear out.

 

[ONERCBOATER]

Re: Purchased 1977 Mercury Thrunderbolt 1150 115 possible missing parts?

for past engines i have gotten standard copper water tubing the soft kind that can be bent shaped as needed, then used a flaring tool so that i could trap it between o-rings or even RTV... has worked fine for me with no issues. though they almost never wear out, i have had them corrode and leak like a soaker hose.

sean