evinrude big twin 40 1968 never used

[derek1810]

hi everyone im hoping some of you can help me with some information
i have recently picked up an evinrude big twin 40 i belive its a 1968 model model no 40803s and serial no C576794
this engine appears to be in new condition i don't think it has ever seen the water as there are still packaging labels on it,
can anyone tell me the run in instructions for this motor ?
and someone told me i may have to have the magneto re generated ???
any advice on this motor would be greatly appreciated
this is a pull-cord start not electric

kind regards derek

 

[jasper60103]

Re: evinrude big twin 40 1968 never used

Correct, that's a 1968 Evinrude 40 HP. The parts catalog can be viewed here...
http://www.marineengine.com/parts/johnson-evinrude-parts.php?year=1968&hp=40&model=40803S

Also, the Top Secret Files has lots of helpful information including instructions for starting
your motor. Good luck.
http://forums.iboats.com/showthread.php?t=299680

 

[derek1810]

Re: evinrude big twin 40 1968 never used

thanks very much for that i will go and search the links you have sent me and will let you know how i go

 

[lindy46]

Re: evinrude big twin 40 1968 never used

Even if it's brand new, it's still 44 years old. It will probably need new coils, fuel lines, water pump impeller at the very least. Check all the wiring for cracks, brittleness. Drain the lower unit and pressure test to see if the seals are still good. Replace the washers on the drain and vent bolts and re-fill with proper marine gear oil. I'd spray some fogging oil in the cylinders to lubricate them good before starting. JMO - others may have additional advice.

 

[derek1810]

Re: evinrude big twin 40 1968 never used

thanks for your reply,
i have already removed the plugs and put a good dose of wd40 into the bores , the wiring seams to be good as far as i can see with no cracks visible
as far as points and coils i havent stripped down for a visual on them
bottom gear casing i have undone both top and bottom vents without any trouble and a small sample of oil (about a teaspoon)was looked at and appears as good as the day it was put in there
the seals all appear to be good
there isnt even a marked screw on this outboard i am hoping it will run, i haven't attempted to start it as yet as i am trying to get information before i attempt a start up
im not sure if their is a different mix for running in or what the run in procedure is
honestly this engine has done nothing it would be great to get this going and to use it as it was intended
i am aware the coils could be shot though im hoping not
do you or anyone else reading this know how much they cost and how difficult they are to install ?
kind regards derek

 

[Tim Frank]

Re: evinrude big twin 40 1968 never used

Even if it's brand new, it's still 44 years old. It will probably need new coils, fuel lines, water pump impeller at the very least. Check all the wiring for cracks, brittleness. Drain the lower unit and pressure test to see if the seals are still good. Replace the washers on the drain and vent bolts and re-fill with proper marine gear oil. I'd spray some fogging oil in the cylinders to lubricate them good before starting. JMO - others may have additional advice.

I'd agree 100% with your advice....OP apparently doesn't.

I am not a believer in the lubricating properties of WD-40....I'd have used fogging oil as you suggested....or TCW-3.
As far as the lower unit oil, again, I'd have gone your route. At 44 years old, that oil may be 100% OK, but I would not take a chance for the $5- that might be saved v. $100s at risk.
Draining "a teaspoonful" and concluding that "it appears as good as the day it was put in there", and reusing the screw seals, are simply false economies. IMO. :facepalm:

I'd have done the pressure test, too.

Service manuals and operators' manuals are also readily available and worth every $$.

 

[derek1810]

Re: evinrude big twin 40 1968 never used

thanks for your comment though i will say that i am on here to gain information to help save me from damaging this motor not to ignore advice given
it would be sacramental to damage this very old motor or any of its original parts after it has lay for so many years can you give me anything positive regarding this motor
ie run in procedure ??
cold start instructions for this particular motor ?
is the mix for run in different
i believe it is 16fl oz to 5 imperial gallons
if i was carefree and trying to keep wrinkles from duct tape i would have already had a serious go at starting the motor
thanks for your kind words my friend
any positive information i am glad to receive

 

[HighTrim]

Re: evinrude big twin 40 1968 never used

I would be extremely surprised if this truly was a NOS motor. Could you post pics?

You can run that motor at 50:1, but I would double up the oil to 24:1 for the first tank.

I would start with a compression test before spending any time or money on it. If all checks out, test the spark and go from there.

As stated, you will most definately need a new impeller before running it. The existing one will be dry rotted and cracked. Also put ethanol proof fuel lines on it, or your carb will get gummed up. The original lines will be no good.

Regarding the gearcase, you wont know how the seals are holding up until after you run it. The oil wont be contaminated as its been sitting. Once on the water, the gearcase may leak.

 

[derek1810]

Re: evinrude big twin 40 1968 never used

i will try to upload pics now my friend what does NOS stand for i am new on here

 

[kfa4303]

Re: evinrude big twin 40 1968 never used

Hi Derek. NOS= New Old Stock which is just an original part that never got opened/used. The motor in the pics, while in good shape for it's age, is not truly NOS. The good news is that these old motors are practically bullet proof and well worth the effort if the compression is ok (over 110 psi in each cylinder). Here's a great link that will familiarize you with "Big Twin" motors like yours. I used to have a '66 33 hp Johnson myself. Great old motor with lots of low-end torque, but it did like to eat gas. Keep us posted.

http://www.duckworksmagazine.com/04/s/columns/max/24/index.cfm

 

[derek1810]

Re: evinrude big twin 40 1968 never used

thanks very much for that very much appreciated my friend
how would you explain the labels that are still on the motor this has been lying in a garage for years
theses would surely have come off in the water,
thanks a load for the link
kind regards derek

 

[kfa4303]

Re: evinrude big twin 40 1968 never used

They built 'em to last back in the day, including the paint and decals. The fact that it was kept in a garage helped it stay in good shape too. You can also buy replacement decals and paint, which someone may have put on over the years. Check Nymarine.com for vintage paint and labels. They're a bit pricey, but very good quality and factory correct. Of course, a pretty paint job won't make it run any better, or faster.

 

[derek1810]

Re: evinrude big twin 40 1968 never used

lol thanks for that
i have managed to create a bond with the old engine but i do believe it has done nothing or very very little there is not a mark on a screw and looking inside the bore with a torch they look immaculate
i want this peice of history running who knows it may even go if i add fuel and a bit of muscle
i just want to be sure things are right before i attempt a start

 

[Tim Frank]

Re: evinrude big twin 40 1968 never used

thanks for your comment though i will say that i am on here to gain information to help save me from damaging this motor not to ignore advice given
it would be sacramental to damage this very old motor or any of its original parts after it has lay for so many years can you give me anything positive regarding this motor
ie run in procedure ??
cold start instructions for this particular motor ?
is the mix for run in different
i believe it is 16fl oz to 5 imperial gallons
if i was carefree and trying to keep wrinkles from duct tape i would have already had a serious go at starting the motor
thanks for your kind words my friend
any positive information i am glad to receive

OK, the best advice I have seen so far is : (not in any order)
1) Drain and Change the gear oil and use new seals on drain plugs.....this is not a "factory new" motor, and you have no idea what the actual liquid in the gear case, at present, might be. If you are prepared to drain a teaspoonful and to go with its appearance, that is your call. If it were mine, I'd drain and refill with new.
2) http://www.ebay.com/sch/i.html?_trksid=p5197.m570.l1313&_nkw=1968+evinrude+40hp+manual&_sacat=0 Get a service manual
3) The manual will show you how to replace the impeller.
4) http://www.ebay.com/sch/i.html?_nkw...t=0&_odkw=1968+evinrude+40hp+manual&_osacat=0 An owners' manual is a great tool also.
5) Put outboard oil into the cylinders to give a preliminary lubrication.

This is not a new motor and does not need a break-in period per se. But as a precaution, as suggested, double the oil for the first tank of fuel (1 l. TCW-III oil to 25 litres gasoline) and run at 1/2-3/4 throttle for , say, 80% of the time, with short increases to full throttle until that first tank is nearly used up.

 

[Tim Frank]

Re: evinrude big twin 40 1968 never used

Followed closely by :
6) change all the fuel lines....they WILL cause you problems.
7) Gear case pressure test.

and back to 1)....as suggested, check compression before you do anything else It is not NOS, you don't know what is going on internally.

 

[derek1810]

Re: evinrude big twin 40 1968 never used

thank you very much for that that was much better than your 1st reply
i appreciate your input
can i ask you where you got the run in instruction from please or at least on why this is the method that you advise

kindest regards derek

 

[Tim Frank]

Re: evinrude big twin 40 1968 never used

thank you very much for that that was much better than your 1st reply
i appreciate your input
can i ask you where you got the run in instruction from please or at least on why this is the method that you advise

kindest regards derek

My first reply was simply pointing out that you had asked for some advice....and then ignored what you received.
My second just rehashed what has been offered so far....and put my opinion of which are most important. Others may disagree.

In very general terms,for that vintage engine, when brand new the break-in period was "about" 10 hours, and you used extra oil....usually doubled. The first 5 hours were usually just up to 1/2 speed, and 5-10 hours 1/2 -3/4 speed with short full speed bursts.
That is my recollection and I'm sticking to it.
In your case, it's not really a true break-in period, more like a "be gentle while you get this running again" period.

You don't know how this motor was treated, how it was stored, and what the inside looks like.

 

[HighTrim]

Re: evinrude big twin 40 1968 never used

I have to say, that motor is in incredible shape, and if it has been run, it hasnt been run much. It is interesting how you found it with the original covers over the intakes and such. I dont think this is a restoration, but hard to tell from the pics alone. The exhaust cover hasnt been heated up at all.

 

[derek1810]

Re: evinrude big twin 40 1968 never used

my friend you never asked me how it was stored granted i never advised apart from stored in a garage.
i said i had picked the engine up,
this engine was the property of my grandfather and i can remember it being in his garage from a very early age i was born in 68 my friend,
no body but nobody was allowed to go near the thing when we were kids
my mother tells me (my grandfathers daughter)that he bought it with the intention of taking his grand kids on a boat that he was going to purchase
my grand mother who is still living put her foot down and had said no way that would ever happen (saftey reasons)and my father who is now also dead had said the same,therefore their was a huge family row all those years ago and i would expect allot of money in that day spent.
i have had several boats since the age of 20 and been to sea with merchant navy i am a registered seaman only to the value of AB may i add
and this motor was left to me in my pappas will
he did always like the last word
so my friend the motor has never been run in
please don't tell me it is not NOS i know that it is
any good advice without judgmental experts would be appreciated
i have a passion for this motor sentimentally
all good advice will be considered
i am sorry that i did not let you know the history
i now look forward to your reply and anyone else who can help me get this motor doing what it should have done 44 years ago
please dont think i am being arrogant as i dont intend to be .
are their any real enthusiasts on here that can help
this is important to me
kind regards derek

 

[derek1810]

Re: evinrude big twin 40 1968 never used

thanks hitrim
that last post i put on was not directed at you though it does answer your question
it was directed at the fellow before you and further readers
hope we can be friends your postings have been A1