Ariens 10 HP Snowblower Backfire and Surging Problem
I have an Ariens 10 HP snowblower with a Tecumseh HMSK 100 Engine. This engine starts easily but it surges and backfires through the muffler when idling. I have completely rebuilt the fixed jet carb except for the Welch Plugs, installed a new fuel line, installed a new sparkplug and replaced the gas with fresh gas. I also have added Sea Foam to the oil and gas but it still surges and backfires. I might add that it seems to perform OK only while under load. Any suggests as to a cure?