1965 Ducktwin won't fire

[mark38090]

I just got this motor from my Dad and not sure how long its been sitting. I bought new coils, points, impeller, and carb kit, I put ignition together and initially had good fire. After changing plugs and checking the other wire, I lost fire on both cylinders, ANy suggestions? I'm new to the 2 stroke engine but it seems really basic. Thats why I'm lost.

 

[AlTn]

Re: 1965 Ducktwin won't fire

Google.. Max Wawrzyniak Bringing a 1956 Johnson 15 hp. back to life...parts 4 and 5 deal with the ignition...I'd suggest you replace the sparkplug wires along with the sparkplug boots and terminals...

 

[cajuncook1]

Re: 1965 Ducktwin won't fire

I just got this motor from my Dad and not sure how long its been sitting. I bought new coils, points, impeller, and carb kit, I put ignition together and initially had good fire. After changing plugs and checking the other wire, I lost fire on both cylinders, ANy suggestions? I'm new to the 2 stroke engine but it seems really basic. Thats why I'm lost.

Great little motor you got there!!!! Here is a link to a good read about your motor. Give a step by step with the ignition and carburetor and other stuff too.

http://outboard-boat-motor-repair.c... Johnson 3 HP 1952-1967 Tune-Up Procedure.htm

Here is a link for a electronic parts diagram for your motor.

http://www.marineengine.com/parts/v...ntage-evinrude-johnson/278643/27864300001.htm

Your fuel to oil ratio is 50:1, but if you would like to keep that little gem good for your son or grandson. Run the fuel to oil mix about 24:1 or 32:1 ratio. The extra oil will protect your motor and make it last a long time. Adding a ounce or 2 of Seafoam to each gallon of fuel mix will help protect your motor and clean out all the old coke/carbon that builds up. The seafoam acts like a stabilizer and gently decarbs the rings and pistons. (Seafoam is some good stuff and it will not harm your engine, it has been around for decades!!)

I have 3 of those little motors. 1957 and 1959 Evinrude and 1958 3hp Johnson. They run great. Mine are a little older, so I have to run them on 16:1 (factory recommended). I use synthetic TWC-3 2 cycle marine oil (8 ounces of oil and 2ounce of Seafoam per gallon) The synthetic blend smokes less and is biodegradable!! They run great!!!

Good luck!!! (if you can, post some pictures of your little beauty!!)

 

[1946Zephyr]

Re: 1965 Ducktwin won't fire

No No No...fuel mix is 16:1 on that. You'll destroy that little gem at 50:1 I have a shattered rod in my outboard collection, from a light twin that died with 50:1 and it was a newer one yet.

As far as the spark goes, you most likely lost contact, where the wires go into the coils. It happens all the time, when you re-use your old wires. If you do happen to re-use your old wires, you want to make sure that you trim off 3/8" of the coil end and the spark plug end, to create a fresh new connection. Unfortunately, this is a common thing that is over looked when new coils are installed.

Sweet little motors. You'll have fun with it.

 

[nwcove]

Re: 1965 Ducktwin won't fire

did the exact same thing to my cd 13, all new parts but scrimped on wires, still had no fire, clipped the wires, and problem solved. i did notice something when i had it apart tho, i didnt tuck one of the green wires from one coil away from rotating parts, and even from just pulling the cord, with no start up, the insulation was chaffed almost through, keep an eye on that !

 

[1946Zephyr]

Re: 1965 Ducktwin won't fire

Yea, I have two motors that have new coils and old wires and both had weak or no spark. Problem solved now.

 

[mark38090]

Re: 1965 Ducktwin won't fire

I can't find plug wires locally so guess I'll have to order and wait. Gives me time to rebuild carb and water pump. Here are a few pics and the boat I'm using this for. Model 3512A Ser. No. B2558

 

[cajuncook1]

Re: 1965 Ducktwin won't fire

No No No...fuel mix is 16:1 on that. You'll destroy that little gem at 50:1 I have a shattered rod in my outboard collection, from a light twin that died with 50:1 and it was a newer one yet.

The factory recommended fuel oil ratio for post 1964 motor with bearings is 50:1. But if you noticed I suggested 24:1 because I get dirty looks for recommending 16:1 oil ratio for motor with bearings. Most of the AOMCI clubs members recommend 16:1 to a very minimum 24:1 for post 1964 3hp Evinrude/Johnson motors.

I agree more oil is better for these little motors!!!

Thanks for the pictures Mark......cool little motor you got there!!!

 

[jbjennings]

Re: 1965 Ducktwin won't fire

In case you're interested, there's new decals for that motor for sale at nymarine.ca
And paint there, too.
Nice motor. Everyone likes a ducktwin! Wish I had one!
Later,
JBJ

 

[mark38090]

Re: 1965 Ducktwin won't fire

Where can I find out what plug wires to use?

 

[AlTn]

Re: 1965 Ducktwin won't fire

the dealer sells them by the foot...it's a stranded metal core wire...iboats, marineengine.com, boats.net..they may all sell it by the foot, I don't know..napa may as well...just don't use the graphite core ignition wires

 

[1946Zephyr]

Re: 1965 Ducktwin won't fire

The factory recommended fuel oil ratio for post 1964 motor with bearings is 50:1. But if you noticed I suggested 24:1 because I get dirty looks for recommending 16:1 oil ratio for motor with bearings. Most of the AOMCI clubs members recommend 16:1 to a very minimum 24:1 for post 1964 3hp Evinrude/Johnson motors.

I agree more oil is better for these little motors!!!

Thanks for the pictures Mark......cool little motor you got there!!!

Well, believe it or not, the 3hp models never did get upgraded to a needle bearing crank and rod set up. Even when they upgraded to a 4hp, they were still a 100% friction based motor. Sadly enough, a lot of the 3's ended up in the scrap pile, because there were many who ran them to lean on the oil. I actually saved one a while back and replaced the crank and rod assembly for the guy.
Later on, the 4hp was redesigned and that was changed, but that wasn't till like the 80's or so. The 5.5 was improved with needle bearings on the crank and rods in 1961, therefore making them a non-friction motor. Oddly enough, the single was re-intruduced in the late 60's and it was built with needles.

Attached below, is a copy of the 3hp decals and it still calls for 16:1 in that year.

 

[nwcove]

Re: 1965 Ducktwin won't fire

napa does sell the stranded core wire by the foot, and in a couple of different colour casings. nice little motor , appreciate the pics!

 

[mark38090]

Re: 1965 Ducktwin won't fire

Is a standard wire off of a newer auto graphite core? I bought individual wires from Oriellys but they are not metal core.

 

[tx1961whaler]

Re: 1965 Ducktwin won't fire

Is a standard wire off of a newer auto graphite core? I bought individual wires from Oriellys but they are not metal core.

The graphite core ones will not work. Most NAPAs sell the metal core wire off of a roll. You can also find it at tractor supply places and lawnmower shops.

 

[mark38090]

Re: 1965 Ducktwin won't fire

Ok new problem, the piece that adjust the tilt of the motor is broken. The arms that connect to the top of the pivot are broken. How do I fix that? Can it be welded?

 

[nwcove]

Re: 1965 Ducktwin won't fire

thats not so good, id look for a replacement part online, or even a parts motor if you could find one within driving distance.

 

[mark38090]

Re: 1965 Ducktwin won't fire

Just found a new old stock for $26.50 shipped.

 

[nwcove]

Re: 1965 Ducktwin won't fire

lucky find!!!!

 

[mark38090]

Re: 1965 Ducktwin won't fire

OK so I fired it up tonight. RUNS FREAKIN AWESOME!!! Now my question, seems to be two sides to the pull the head arguement. I think it might be getting a little hot, it has some water spray from the holes on the middle of the shaft but when water splashes on the head it doesn't really sizzle but more steams up some. How do I tell if I need to pull the head and clean water jackets?