I have a Honda push mower starting its fourth year of service. For the past two+ years it has been extremely hard to start when cold. After it starts, it is easy to restart until the next mow.
Here is what I have tried:
new spark plug (old one looked perfect...heck it was hardly "old")
changed air filter (wasn't needed)
verified choke is activating when cold
1/4 can techron in a tank of fuel - did this a couple times
I always mix 1 ounce TCW3 per 5 gallons gas, and use ethanol free premium 91 octane
None of the things above have had any impact on the hard starting. Most of the time I need a slight whiff of starting fluid to get it to kick off. I just basically gave up on trying to fix it. A couple of weeks ago I was trying to beat some rain and started mowing. I thought I had some gas left in my can and got about half way through before the tank ran out. Went to grab the can...RATS, it was dry. It was 15-20 minutes away from raining, so I grabbed my gallon of pre-mixed engineered 2 stroke 40:1 fuel I use for my blower (used to use on all my 2 stroke equipment, but all I have left is a blower). It was expensive, but the only way to finish the mowing before the rain. I dumped the rest of what I had in the tank which almost filled my mower and finished mowing. The mower ran great...no concerns, no smoke.
I pulled the mower out the next weekend, and to my surprise it started FIRST PULL. It has not done that since the first year I owned it. It also seemed to have a bit more power (yes, probably my imagination). I got to mowing and refilled with normal gas when needed.
Fast forward to today, it has now started cold on the first pull three times in a row on straight gas. I don't know what is in the engineered fuel, but it seems to have solved my problem.
Here is what I have tried:
new spark plug (old one looked perfect...heck it was hardly "old")
changed air filter (wasn't needed)
verified choke is activating when cold
1/4 can techron in a tank of fuel - did this a couple times
I always mix 1 ounce TCW3 per 5 gallons gas, and use ethanol free premium 91 octane
None of the things above have had any impact on the hard starting. Most of the time I need a slight whiff of starting fluid to get it to kick off. I just basically gave up on trying to fix it. A couple of weeks ago I was trying to beat some rain and started mowing. I thought I had some gas left in my can and got about half way through before the tank ran out. Went to grab the can...RATS, it was dry. It was 15-20 minutes away from raining, so I grabbed my gallon of pre-mixed engineered 2 stroke 40:1 fuel I use for my blower (used to use on all my 2 stroke equipment, but all I have left is a blower). It was expensive, but the only way to finish the mowing before the rain. I dumped the rest of what I had in the tank which almost filled my mower and finished mowing. The mower ran great...no concerns, no smoke.
I pulled the mower out the next weekend, and to my surprise it started FIRST PULL. It has not done that since the first year I owned it. It also seemed to have a bit more power (yes, probably my imagination). I got to mowing and refilled with normal gas when needed.
Fast forward to today, it has now started cold on the first pull three times in a row on straight gas. I don't know what is in the engineered fuel, but it seems to have solved my problem.