Carburetor/Carburetor 11. Install O-ring on carburetor intake. M36960 -UN-25JAN90 M98,2050K,35 -19-21OCT85 13. Install air intake. Fasten with four screws. M36959 -UN-25JAN90 CTM2 (19APR90) 50-15 16, 18, 20 & 24HP Onan Engines M98,2050K,37 -19-21OCT85 AllTractorManuals.com 130495 12. Install gasket. -UN-25JAN90 M36961 T260 Engine -UN-25JAN90 M36968 B43E, B43G, B48G, P218G, OR P220G M98,2050K,36 -19-02FEB87 50 15