UPDATED ISSUE! UH oh!! 1970 Evinrude 6 hp. Got it running now but have some issues.

[staugdave]

I would like to thank you guys for all your knowledge I've gained from reading these forums. With your help I now have my 6hp running. The points were incorrectly adjusted and would not fire. I have it firing and running now, however....

First issue:
I am unsure of the direction of the impeller. I checked the impeller and it's new. I was told by the previous owner it was replaced as well as the condensers and points. I pulled the flywheel and those ignition parts are shiny and new as is the impeller. So I have no reason by visual check and previous owners claims that it's in fine shape. However after about 10 minutes running in a small tub it seems to be getting warm! Can an impeller really be backwards?

Second issue:
After running for about 10 minutes it started to run rough and misfire. I was honestly playing with the idle adjustment so maybe I jacked something up with that. The first few minutes ran very smooth albeit a little smoky!

What should I check next?

Honest admission... this is my first time adjusting points so I could be off a little on those.

What is the normal starting position for the idle adjustment?

Thank you!!!

 

[staugdave]

Re: 1970 Evinrude 6 hp. Got it running now but have some issues.

Re: 1970 Evinrude 6 hp. Got it running now but have some issues.

Let me add to this that the block is hot!!! Like spit on it and it sizzles hot!!!!

What's wrong with my new baby?

Thanks again!!

 

[boobie]

Re: 1970 Evinrude 6 hp. Got it running now but have some issues.

Re: 1970 Evinrude 6 hp. Got it running now but have some issues.

Put it in a bigger tub so the water is half way up the exhaust housing.

 

[jrs_diesel]

Re: 1970 Evinrude 6 hp. Got it running now but have some issues.

Re: 1970 Evinrude 6 hp. Got it running now but have some issues.

Even if the impeller was installed backwards (vanes pointing the wrong direction), they usually flip over the correct way after a couple of revolutions.

If running in a barrel, make sure there is enough water to completely submerge the lower unit and also go about halfway up the exhaust housing. This will ensure the water pump can pull water and not any air.

You cannot easily run this engine on a hose. Best way I know to do it is to drop the lower unit and make a garden hose to water tube adapter.

One other thing you can do is remove the three bolts on the thermostat plate (triangle shaped plate on top of the cylinder head), remove the plate and look at your thermostat and see if it is plugged.

 

[staugdave]

Re: 1970 Evinrude 6 hp. Got it running now but have some issues.

Re: 1970 Evinrude 6 hp. Got it running now but have some issues.

Thanks fellas. I pulled the thermostat cover plate and there is not a thermostat in the engine. At least I know water should be getting past that point. I'll need to find at therm however the schematic on here shows that part as obsolete. Where do I find cross references to that info? I didn't see anything on the Top Secret post.

I guess I will try and make sure water is pumping up to the thermostat tonight, When I pulled it this morning it looked like it had not been wet in ages. Maybe it just dried out really well because of how hot it was. What next?

Thanks!

 

[HighTrim]

Re: 1970 Evinrude 6 hp. Got it running now but have some issues.

Re: 1970 Evinrude 6 hp. Got it running now but have some issues.

Run it with the cover off and see if water is shooting out.

As stated, ensure the water pump is submerged, they aren't self priming.

When it is sneezing might just be lean after warmed up. Richen the needle some, CCW.

 

[HighTrim]

Re: 1970 Evinrude 6 hp. Got it running now but have some issues.

Re: 1970 Evinrude 6 hp. Got it running now but have some issues.

The t stat part number is 5005440, or the Sierra equivalent of 18-3543, still readily available.

 

[Fleetwin]

Re: 1970 Evinrude 6 hp. Got it running now but have some issues.

Re: 1970 Evinrude 6 hp. Got it running now but have some issues.

+1 on making sure the leg is completely submerged.

The only other issue could be that the water pipe (lower unit to powerhead) was not connected correctly.

The L/U is easy to drop. I would do it again just to "have a look".

 

[staugdave]

Re: 1970 Evinrude 6 hp. Got it running now but have some issues.

Re: 1970 Evinrude 6 hp. Got it running now but have some issues.

Thanks fellas! I picked up a thermostat today. I'll put that in tonight after I make sure I am getting water up that far.

I might need a larger bucket, it's only 15 gallons but will definitely submerge the L/U. I'll report back with the results.

Thanks!

 

[HighTrim]

Re: 1970 Evinrude 6 hp. Got it running now but have some issues.

Re: 1970 Evinrude 6 hp. Got it running now but have some issues.

I don't think you will get the depth/volume you need with a 15 gallon bucket. The water pump sits up above the mating surface of the lower unit to gearcase. You usually want the water line just a couple inches below the exhaust relief hole.

 

[Crosbyman]

Re: 1970 Evinrude 6 hp. Got it running now but have some issues.

Re: 1970 Evinrude 6 hp. Got it running now but have some issues.

adding a thermostat is not going to make it run cooler ... if you anticipated that effect .

it will only stabalyze the temp once the intial high temperature issue is resolved.

nice little motor .. .a bit like a 50's 7.5 (with a fuel pump amd thermostat added on.)

if impeller intake,impeller and water feed tube are all ok you may need to pull the head to inspect water jackets for mineral deposits. You can dremel the crud out

Not a big deal anyway but a new head gasket will be needed.... to be safe.
A good occasion to correct any warping on the head also

it will give you and oportunity to inpect piston heads for carbon build up.

Pulling the side exhaust cover and water plate will alos allow a good inspection. and manual carbon cleaning if any build up.

 

[staugdave]

Re: 1970 Evinrude 6 hp. Got it running now but have some issues.

Re: 1970 Evinrude 6 hp. Got it running now but have some issues.

Today's update:
I dropped the lower and found the copper tube bent into a z shape! I pulled and straightened that tube out to get the right length for the water pump to connect to it. Here's where the fun of a 43 year old motor comes in. At the top of the copper tube where it connects with the lower unit housing there is a female coupler for lack of a better term. This female end was mush and fell out in pieces. I was able to put the copper tube in the 1/2 inch of space that was left and water will pump into the head now, however I'm sure I'm losing some pressure by not having the top of this tube into the female end with the rubber piece to help seal it up.

By repeated efforts I was able to get everything back together without the copper tube falling down but it was no small feat. I am sure this is not a good long term fix but it's working enough to continue working on the motor.

It's a nasty place in there so I'm not sure how to "fix" this. If I clean in there as much as possible can I JD Weld the copper tube into whats left of the upper end where the tube goes in? It's greasy, dirty, and wet in there but I assume I can get it cleaned up a decent bit.

What would you do?

Thanks!

 

[Crosbyman]

Re: 1970 Evinrude 6 hp. Got it running now but have some issues.

Re: 1970 Evinrude 6 hp. Got it running now but have some issues.

the female end ?? is probably just the grommet ( part 57 on the diagram) it is identical to the one on the water pump body. the watr tube needs one at each end

why not just get a new grommet .

it has a small nipple to lock in place. probably a pain to line up but if you fit the grommet on the tube and put a coat of petrollium gelly on the external surface you can slide it back in and wiggle it in place.

if all else (no grommet) fails well try a 1 inch long, thick piece of rubber tube (1/2 inch or so I.D. fuel line?) over the water pipe's end . Thick enough to match the inside diameter of the inlet (it will be the same diameter as the ouput on the water pump) , glue it in place on the tube's end. it should be enought to prevent water pressure loss to the powerhead

p.s. I wouldn't JB weld anything inside the lower unit because it will not adhere properly (grease-oily surfaces). Any future need to remove the water tube would be a pain if it ever did manage to hold.

just mho

 

[staugdave]

Re: 1970 Evinrude 6 hp. Got it running now but have some issues.

Re: 1970 Evinrude 6 hp. Got it running now but have some issues.

Crosybman,
What actually broke is part of the metal in the housing. So part#57 would slide into a metal tube where you indicate the grommet would lock into place. What I'm saying is the metal tube part fell apart like mush. so the entire piece that would have the grommet fit into is gone.

Without building something around it the copper tube has no proper fitting to go into.

If I could find a cross section image I could show you but for now I tried to make a drawing.



The part circled in red is what has broken/disintegrated.

Does this help show what's broke?

Thanks!

 

[the machinist]

Re: 1970 Evinrude 6 hp. Got it running now but have some issues.

Re: 1970 Evinrude 6 hp. Got it running now but have some issues.

That motor uses a driveshaft that has a cross pin on the upper end that needs to be slid into a slot as it is assembled. This cross pin puts pressure on the lower part of a shaft seal. For an exploded view & article for that motor go to Johnson

 

[Crosbyman]

Re: 1970 Evinrude 6 hp. Got it running now but have some issues.

Re: 1970 Evinrude 6 hp. Got it running now but have some issues.

Ok understood... bummer
Unless the expert can help out here is my take on this

It is a hard place to work into so....being that that powerehead is almost a dead ringer to a 5.5 or 7.5 late 50's I suggest you consider pulling the head to access the top portion of the water inlet coming up from the exhaust casing. (see link below)

Maybe just maybe you can slide a new (thin wall) copper pipe DOWN the water feed cavity , A piece long enough to join the top of the water pump grommet. (tricky measurement but just trial and error it).

JB weld the top section in place .

Flange it a bit if posible and glue it down after the proper lenght has been acheived. This will prevent any further downward and upward movements of the new insert since you must reassemble the L.U. and
then the powerhead, shift linkage and all

Granted this will/could reduce the water cooling capacity somewhat but it may be a much better solution than loosing pump pressure mid-point in the exhaust section.

You will likely need a new base gasket when reassembling the powerhead

http://www.youtube.com/watch?v=SVOedhzPP7M
good luck

 

[staugdave]

UPDATED ISSUE! Uh oh! '70 Evinrude 6 hp. Got it running now but have some issues.

UPDATED ISSUE! Uh oh! '70 Evinrude 6 hp. Got it running now but have some issues.

Alright fellas! I really need your help now! I was able to clean and grind to expose clean metal so that I could pack JB Water Weld in so that it holds the copper tube in and it's working great! She's pumping a lot of water and running great.

Next problem! The shift lever just let go somehow. The lever turns but it's clearly become disconnected from the actual shift rod. How do I get to that?

Thank you again in advance!! I'm learning!

 

[staugdave]

Re: UPDATED ISSUE! UH oh!! 1970 Evinrude 6 hp. Got it running now but have some issue

Another potential adjustment to how she's running also. After running for about an hour and a half in a tank she was still not getting hot but started running really rough and cutting out. I could keep it running by pulling the choke in and out but it wont run without doing that!

Coils?

 

[kfa4303]

Re: UPDATED ISSUE! UH oh!! 1970 Evinrude 6 hp. Got it running now but have some issue

Hi dave. If you need to choke the motor that means it is running too lean (i.e. a "lean sneeze" = not enough fuel to air). You'll need to back the low speed idle needle out about 1/8-1/4 turn then wait for 20-30 seconds for it to take effect. Here are some other handy links.

Johnson

1970 Evinrude 6003B 6 hp Outboard Motor Parts

 

[staugdave]

Re: UPDATED ISSUE! UH oh!! 1970 Evinrude 6 hp. Got it running now but have some issue

Thanks! I will try and adjust the low speed needle. It's odd that it was running perfect for 1.5 hours and then started dying. I was running a Seafoam treatment through it at the time and had just started to run out of fuel. I switched to a tank of regular fuel with no change though.

The shift linkage is what's really got me at this point. Can I access the upper linkage without removing the powerhead?