5081D Maintenance Minder For 2 and 4 cycle engines. Display flashes every 25 hours run time. $ 19.95 5106A Protection Plus Kit Used on 3.5 to 6 HP Quantum® engines. $ 9.95 5107A Protection Plus Kit Used on 3.5 HP Classic™, 3.75 HP Sprint™ and 4.0 HP Quattro™ engines since 1992 $ 9.95 5108A Protection Plus Kit Used on 5.5 through 6.5 HP Intek™ engines. $ 11.95 5109A Protection Plus Kit Used on most 10.5 through 13.5 HP Vertical Shaft Single Cylinder L-Head ride-on engines $ 17.95 5111A Protection Plus Kit Intek Twin Maintenance Kit. Used on most Intek V-Twin 18-25 HP engines. $ 32.95 5123A Protection Plus Kit Used on single cylinder 8-11.5 hp briggs engines. Includes oil, spark plug, fuel stablizer, and air filter (2-3/8" is height). $ 19.95 5119A Protection Plus Kit To be used on Vanguard V-Twin 12.5 to 21 HP engine. $ 27.95 5127A Protection Plus Kit Used on 15.5 and 17-18.5 hp briggs intek engines. Contains 698083 air filter, 492932 oil filter, 20 oz briggs oil, 48 oz briggs oil, fuel stabilizer and fuel filter. $ 27.95 5110A Protection Plus Kit Used on twin cylinder 14-21 hp briggs engines, includes oil, two spark plugs, fuel stabilizer, air filter $ 19.95