Tiller movement almost locked in neutral on Evinrude 18HP 1960 mod 15032

[Sam M.]

In my experience, some 2-stroke outboards smoke a lot until they are warmed up.  Then it’s quite minimal.  Keep in mind that there will probably be more unburnt fuel at startup because you either primed the motor  (actually, it depends on the primer design if it will richen the fuel/air ratio or not, but that’s not the point)  or gave it choke (or both) to start it.  This gives it more gas, but not more spark to burn that gas.

Also, synthetic oil is known to burn cleanly in 2-strokes, so I would not listen to that dealer warning you about putting too much synthetic oil in your fuel mix.  More oil is safer than less for these old 2-stroke outboards.

[Tubs]

Salnaes, I actually use synthetic oil. I started in the late 1970’s using Amsoil. Sometime in the 90’s I began using the Pennzoil, Full Synthetic as it was biodegradable. When they discontinued it I bought all I could. There was almost no smoke and any oil slick on the water would disappear. I pretty much ran out in 2022. Finding a full synthetic, biodegradable, replacement has been challenge. The “G” oil is no longer being manufactured. I can find the BelRay on eBay but the BelRay website no longer list a biodegradable oil. Last year I bought a gallon of the Stihl HP ultra biodegradable oil and was comparing the Belay biodegradable oil to the Stihl HP, running two 1929 Elto Folding Lightweight’s. I believe I was using the BelRay when running them separately, and the Stihl HP when running them together. I’ll add a video link below.  In most all my outboard motors I run 3 oz. per. gall. A bit more that 2%, but as we use ounces and gallons here, it keeps it simple. Most of my motors are pre. WW-II bushing motors, however I do have a few from the 50’s and 60’s. I just bought more BelRay and another gallon of the Stihl HP to do more comparing on a 1931 Johnson OA-55 this year. I have recently learned how to do videos and have some in a play list on my you tube site. All except the small1 hp. motors are running run on that mix, and all but the twin 1929’s are running on the Pennzoil. What synthetic oil are you using? This is not a recommendation – just my experience. You might find it interesting that this Johnson service bulletin updated the oil ratio to 50 to 1 for your motor over 50 years ago.    

Video link  https://youtu.be/l1ext_nsrYM?si=wphqpdoI6Mqq-P0t.  

 

A "Boathouse Repair" is one that done without having tools or the skills to do it properly.

[salnaes]

Tubs, I have no special preferences regarding brands, so I just went to the petrol station and bought what they had available. It’s called Aquaway and specifications are NMMA TC-W3. Last summer it did not create smoke at all, but this year it’s another story. But it might be better performance at sea than in a barrel. In the barrel there was a lot of unburned oil floating on top of the water. But of course, when you run an outboard in a barrel it’s just for a short period, and no boat to push forward, so it might be an explanation that the engine did not struggle to become warm enough.

[Author]

Posts