Originally Posted By: jeepman3071
Originally Posted By: Panzerman
Also I personally would Never run a 80 or 100 to 1 ratio. I don't even run 50:1 in my Echo power equipment. I run 32:1 in all the lawn equipment including the Lawnboys and chainsaws.
I have never had any two stroke issues and my equipment lasts. My one lawnboy is in the 80s. My two I use every week are 1996. More oil is better.
Those lean ratios are all about the EPA and meeting pollution requirements. Want it to last, let it smoke.
Not quite. Oil technology is far superior to the 1980s or even 10 years ago. I have many customers who use 2-stroke equipment commercially every day with zero oil-related issues on 50:1. Many use the Echo, Stihl, Husqvarna, and even the cheap box store branded 50:1 oils with no problems. A lot of newer engines have non-adjustable carburetors as well, so if you run a richer oil mix the engine won't have as much power and may even stumble upon throttling up if running 32:1.
Adding more oil may make a richer oil to fuel ratio, however, it also creates a leaner fuel to air mixture. To what extent this lean-ness has on engine operation is nebulous to me. I've got old two cycle motorcycles and snowmobiles with oil injection. From what I've read, the oil delivery with oil injection can vary from as much as 10:1 to 70:1 or higher. If carburetors can manage that much variance with no negative effects on the engine, I'd say that adjusting the oil to one's personal preference will have no ill effects on the engine provided there's sufficient oil.
I use good quality conventional oil and run relatively high oil ratios in equipment designed to run at 100:1 and 50:1 with no obvious effects other than a bit more smoke on start up. Once at running temperatures, there's very little smoke.
My 50:1 Echo & Stihl trimmers get 32:1 TC3. My 100:1 Yamaha outboards get 70:1 TCW3. Some equipment such as my water pump and chainsaws get 25:1 TC3 which is the designated ratio. Never heard of a two cycle engine dying from too much oil and I've never seen one run poorly if the oil ratio is reasonably increased.
Bottom line is that a two cycle engine will not experience catastrophic failure caused by too much oil. On the other hand, an engine with insufficient oil will.