Carburetor for Tecumseh LH318SA LH358SA HMSK90 8HP 9HP 10HP Engine snow blowerNew Carburetor Replacement for Tecumseh Engine. Fitment: (They are for). Tecumseh 8HP 9HP And some 10HP Horizontal Snowblower Engines. Engine Types As: HMSK80, HMSK90, LH318SA, LH358SA. Please Match OEM Replacement Part #: 640349, 640052, 640054. The item “Carburetor for Tecumseh LH318SA LH358SA HMSK90.