Portable Maintenance Kit For 992Cc Engines By Generac 5721. Product Details Scheduled maintenance is a necessity to ensure the long life and top performance of your portable generator. If your generator has been running for extended periods or has been stored for several months, it's a good idea to change the oil and fill the tank with fresh gasoline. Be sure to review your owner's manual for the suggested maintenance schedule. Oil must be purchased separately. Portable maintenance kit for 992cc Engine Helps you extend the life and maintain the performance of your portable generator Includes air and oil filters Also includes spark plug and a spark plug wrench, oil funnel, stable sample Chamois pieces Payment We accept PayPal and credit cards via PayPal. Taxes - US We collect sales tax, as required by law. Shipping We make every effort of shipping within 3 business day of payment clearing. The estimated delivery time is 2 - 5 business days from the shipping date. Policies If you do need to return your item, please contact us via email (you will receive an email when your product ships with additional details - Subject: Important information about your purchase). You will then be provided with a return shipping label and packing slip. Pack the item carefully. Include the packing slip, apply the shipping label, and return the item within 30 business days of the date you request a return, or your return will be canceled. Once we receive your order we will inspect the return. Please allow up to 5 business days of receiving the returned item for your refund.