Start/run issue. '64 18hp Evinrude.

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tesnevo

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Feb 24, 2007
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I have a 18402 18hp 1964 year Evinrude. (I do have the manual as of today d:)) I replaced the plugs, fresh gas/oil mix (I did mix it at 3gal to 1/qt for 50:1)
I am able to get it to start with some choke lever playing but it will die on me. Sometime it will run for about 2-3 minutes (always roughly like its bogged down and thats while its at full start handle lever)
Anytime I move the choke lever open or completely closed it wont start. Only about at 1/2 to 3/4 choke and never consistent.
Also I checked the fuel pump and it is pumping out fuel but I don't know at what pressure. I did have to tighten one nut holding the carb on but it did not change anything. Does it sound like a carb rebuild is in order?
Or should I do other/more?
The motor sat since 1998 but it did have all of the gas run out prior to garage storage. Not that it helped.
Also the relief hole for the cooling water, where does it come out on these motors?
I assume it is supposed to be coming out at halfway up the back of the Gear case Housing (two holes facing back) PEEING as some say. Or should this only happen when the prop is engaged forward-reverse?
I do get a nice bubbly gurgle at the entry for the pump intake. (above the prop)

Thanks for the help.
 
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tesnevo

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Re: Start/run issue. '64 18hp Evinrude.

I wanted to add this afterthought:
After reading alot of the threads on here I have one more thought/question. Could it be the coils causing this issue?
I have not checked them as of yet but was reading up and come across this. Thanks.
 
S

Saskatoon2005

Master Chief Petty Officer
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Apr 27, 2005
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Re: Start/run issue. '64 18hp Evinrude.

Tesnevo,

Way to go man, you hit the nail right on the head! Firstly, check out those coils. I would almost guarantee that they are cracked and leaking (if they are original). Do you have an inspection hole in your flywheel? Open it up and see if the points are set right. If no inspection hole. Do it all when you get the flywheel off.

It is really easy to get the flywheel off by using an automotive puller. You can buy one really cheap like ten bucks. Get that flywheel off and replace the points, condensers, and most importantly the coils. You might as well replace the spark plug wires while you are at it. Then that will get rid of the electronic portion of your troubles.

It is funny, because when I purchased my 1961 Johnson Outboard, I decided to replace all of the electrical goodies and it makes such a difference. I couldn't get my boat to WOT and replaced the cheap electronic stuff and wamo, I had full power again...I'll look for the post of my 1961 Johnson (it is in here) and then you can use it to help you...I have many pics on there that would walk you through the job. Good Luck!
 
samo_ott

samo_ott

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5,125
Re: Start/run issue. '64 18hp Evinrude.

And after that if it still runs rough, a carb kit would sure help and are not hard to install. Also think about a new impeller if it has sat for 9 years. I have a '60 and a '66 18hp. And yes, the water/exhaust mixture comes out halfway down the rear leg at all times that the engine is running and in any gear. There is no pee hole per say on this model. The bubbly gurgle at the entry for the pump intake (above the prop) is the rest of the exhaust exiting under water.
 
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tesnevo

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Feb 24, 2007
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Re: Start/run issue. '64 18hp Evinrude.

I appreciate the information and replies. The local dealer told me that the motor "did not" exit out (water) half way down the rear gear case housing.
So I did run it and work on it with this assumption. Granted the lower was submerged in water the whole time it ran, but alas, no stream of water ever exited the rear.
And I never put it into gear because it never ran well enough to try.
Hopefully it didn't over damage the motor.
I will dig into the flywheel today.
 
F

F_R

Supreme Mariner
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Jul 7, 2006
Messages
28,226
Re: Start/run issue. '64 18hp Evinrude.

There is a large hole about halfway up the rear of the midsection. Water should blow out that hole anytime the motor is running. It will be significant and unmistakable. Concerning all the rest, yep check the coils.
 
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F_R

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Re: Start/run issue. '64 18hp Evinrude.

Rereading the question, I notice you said you mixed a quart of oil to 3 gallons of gas. That is way too much oil! If you actually have that much oil in there, no wonder it won't run.

Proper mix is one pint of oil to 6 gallons of gas. (1/2 pint to 3 gallons) That is 50:1
 
T

tesnevo

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Feb 24, 2007
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7
Re: Start/run issue. '64 18hp Evinrude.

F_R said:
Rereading the question, I notice you said you mixed a quart of oil to 3 gallons of gas. That is way too much oil! If you actually have that much oil in there, no wonder it won't run.

Proper mix is one pint of oil to 6 gallons of gas. (1/2 pint to 3 gallons) That is 50:1
Click to expand...


Oops, sorry. Bad typing strikes again. I did mix 1/2 qt. to 3gal of gas for 50:1.
Not 1qt to 3gal.
 
C

clemsonfor

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1,011
Re: Start/run issue. '64 18hp Evinrude.

still to much oi its 1/2 pint to 3 gals.

-nate
 
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perkdp

Petty Officer 1st Class
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Sep 25, 2002
Messages
237
Re: Start/run issue. '64 18hp Evinrude.

I have a 1973, 18 hp that had similar symptoms.
Check that both plugs are firing.
I had one kill switch lead touching ground, killing one cylinder.
If only running on one cylinder and over oiled,,,,

If it is not spitting water, add a new impeller, early because it will still get hot on the cylinder that's running.
 
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perkdp

Petty Officer 1st Class
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Sep 25, 2002
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Re: Start/run issue. '64 18hp Evinrude.

I re-read these posts... you mentioned tightening the carb. It does have a gasket / good gasket between the carb and intake, doesn't it ?
 
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