1970 Mercury 50 general maint. question

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Camlee98

Petty Officer 2nd Class
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Aug 7, 2009
Messages
110
Re: 1970 Mercury 50 general maint. question

Nothing wrong with hanging on for the ride wood. These guys are great here at iboats!!!
I ordered up a base. I figured if I have it apart might as well do it up.
 
WoodOnWater

WoodOnWater

Cadet
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Sep 3, 2012
Messages
28
Re: 1970 Mercury 50 general maint. question

Hey, Don,
How is the repair going? I just picked up a water pump repair kit. Impeller and gaskets. I don't think it came with shaft seals that go in the lower housing. I haven't pulled mine from the housing yet, but one is definitely damaged. Did you pull your lower pump housing out of the lower unit?

To all,
I'm confused on the shaft seals that go in the lower pump housing. This site..

http://www.iboats.com/Mercury-35-70...7833274--session_id.162809196--view_id.272936

lists the item as #13, but has four listings for it: 13, 13a, 13b, and 13c with two listings for c.

This site..

http://www.marineengine.com/parts/m...2858813/gear-housing-assembly-complete-page-1

lists the seals as 14 and 15 (different entities) with multiple choices in each. I get the multiple choices as different suppliers, but I don't get the single listing verses the dual listing between sites. I need to get these seals, but I want to be sure I'm getting the right product. Any insights?

A third site..

http://www.crowleymarine.com/mercury-outboard/parts/471_19.cfm

also lists two components.
 
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oldman570

Lieutenant Commander
Joined
Mar 25, 2011
Messages
1,615
Re: 1970 Mercury 50 general maint. question

The seals on the Crowlley Marine site are for the driveshaft and are correct. If those seals need to be replaced one will face towards the LU gears and the other faces the waterpump housing. They keep the oil in the gearcase and not let it the aera of the waterpump and vise a versa. If there was no water in the LU and no oil in the pump housing the seals are probbly good and will not need to be replaced. otherwise the whole LU will have to come apart, to replace them, and would be better done by a ceritified marine machinic, as special tools will be needed to do the job correctly. I've never had to replace any of them in all the time that I've worked on those motors replacing water pumps. the seals are # 14 &15 on the Crowlley site. As noted on the other sites some kits will come with extra parts that is not needed inorder to repair just the waterpump. A call to Crowlley will get you just what you need to replace, repair the pump.
JMO
Oldman570
 
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Camlee98

Petty Officer 2nd Class
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Aug 7, 2009
Messages
110
Re: 1970 Mercury 50 general maint. question

I'm still waiting for the base to come in so while I wait can anyone tell me which steering linkage fits this thing? I'm going to need one and don't have the slightest clue.
Thanks
 
GA_Boater

GA_Boater

Honorary Moderator Emeritus
Joined
May 24, 2011
Messages
49,038
Re: 1970 Mercury 50 general maint. question

I don't know a part number for the link. I think the link is the same for multiple motors and years, but I'm not completely sure on that.

On the washers for the vent and fill screws - is it possible that Crowley has a minimum order of two of the blue washers? I thought the washers were the same for the fill and vent.

The flushing port is sealed with three parts - screw, washer and a seal which fits between the pump housing and side of the lower unit. I'm going by memory which isn't always a good thing. I do get confused by the parts diagrams sometimes, especially when they have more than one part number for the same thing plus Sierra and Mallory numbers.

Hope this helps.
 
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Maxz695

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Camlee98

Petty Officer 2nd Class
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Aug 7, 2009
Messages
110
Re: 1970 Mercury 50 general maint. question

Thanks guys....I found the seal for the flush hole. It was attached to the screw. I'll be putting is all back together tomorrow and with any luck all will go smoothly LOL.
 
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Maxz695

Guest
Re: 1970 Mercury 50 general maint. question

looks like they have a bait well plug in there (Anode cap) You can get thosebait well plugs at wallmart sporting goods section. Theres supposed to be a plastic cap in there I never woulda thought of something like that LOL
 
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Camlee98

Petty Officer 2nd Class
Joined
Aug 7, 2009
Messages
110
Re: 1970 Mercury 50 general maint. question

Couple more questions ....4 rainy days coming so I'll be doing engine work now lol
I watched a youtube video on replacing the impeller. When he put it back together he mentioned making sure the shaft was centered with the cover hole. For the life of me I've tried 3 times loosening the bolts getting it straight and then I tighten the bolts back up and it still shifts. Why can't I get it straight?

Next I attempted to slide the lower back on and I get about an inch away and it stops. I've read here on the forums that things get out of whack but I can't find what they are. It came off nice and easy and I didn't mess with anything so why won't this thing slide back in? Is it a matter of just getting the splines at the top of the shaft lined up?
 
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oldman570

Lieutenant Commander
Joined
Mar 25, 2011
Messages
1,615
Re: 1970 Mercury 50 general maint. question

Yes, the LU has to be in gear so you can turn the DS to get it to line up, or you have to turn the flywheel to do so. Be sure that the shift linkage is in the same position as the LU if you turn the prop to line up the DS splines or you will be taking it back off to do so. Also make sure that the water tube is in the motor and pump while putting the LU back on the motor.
Oldman570
 
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Camlee98

Petty Officer 2nd Class
Joined
Aug 7, 2009
Messages
110
Re: 1970 Mercury 50 general maint. question

You know sometimes it's the little things that bite ya in the but! When I put the black plastic piece (shift linkage holder?) back in I didn't know that the metal rod had to go thru the hole. Soon as I figured that out presto the lower unit slid right in...LOL

Now I need to figure out how the throttle and shift cables get hooked up. Anyone have a picture of how they are attached? I bought new ones and it didn't come with any when I bought it.
 
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Maxz695

Guest
Re: 1970 Mercury 50 general maint. question

Hook up the throttle first. check to see both cables are sliding nicely.Then set to neutral. The cable that moves first is the shifter cable. Set the shifter bracket( Sliding bracket in neutral) The prop should spin freely in both directions. That will confirm neutral. The barrel cup at the front of the bracket will hold the cables. slide the shifter cable as described above in the barrel cup on an angle after it is in the cup, lower the end of the cable to the shifter cable end clamp. adjust the barrel (Scew in for less and out for more cable) Until it is in line with the pin that the cable end will slide on to favoring just slightly the foward position ( Operator prefered preference only). Swing the clamp over the cable and lock it down. As for the shifter cable make sure the throttle arm is full back to idle and adjust the barrel in the same manner Into cup and in line with the throttle arm clamp. I prefer to adjust the barrel dead even with the clamp for full reach of the open throttle for WOT. Clamp the cable down. after all that where the barrels are there is a not so tricky swing clip to slide into the grove and swing lock the clip. If you have never opened the clip. Be gentle with it there are 2 pins on the inner part of the swing clip. Put both pointer fingers on these pins and gently push it back and then lift up and the swing arm will swing up and out allowing you to insert the barrel lock and then swing the arm back into it,s original position
 
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