Generac 6485 Scheduled Maintenance Kit for 20kW and 22kW Standby Generators with 999cc Engine Black

I decided to do this myself for the first time. I have a Generac Guardian Series 22KW 999 cc Engine, Model No. GOO70422. So 7042 in the list below.If the first 4 numbers of your Generator's model number begins with: 6055, 6098, 6103, 6244, 6250, 6258, 6551, 6279, 7034,7035,7036, 7037, 7038, 7039, 7040, 7041, 7042, 7043, 7045, 7048, 7049, 7077, 7078, 7141, 7142, 7145, 7146, 7163, 7173, 7174, 7175, 7176, 7177, 7178, 7189, 7209, 7210, 7218, 7219, 7291 then this is the right kit for you!This kit consists of:1 Oil Filter part no.: 070185E1 Air Filter part no.: OJ84782 Spark Plugs part no.: RC12YC (which is the Champion equivalent of Generac part no.: OGO767A)I recommend doing the Spark Plugs and Air Filter before you do the oil change since the motor doesn’t need to be hot for that part of the job and is more comfortable to work on cool. Especially in the Summer!Spark Plugs: The Champion RC12YC spark plugs come pre-gapped from the factory at .38 so you’ll need to widen the gap slightly to get it to .40 as recommended by Generac. If you are using a ramp style plug gap gauge you will want the center of the electrode to be centered on the .40 line on the gauge. You’ll need a 5/8 Spark Plug socket and a Torque Wrench. Plugs should be torqued to 25 Newton Meters.Note: I needed only the wrench and socket to remove the plugs. I did not need any flexible extensions as some did. Flexible Extensions can cause the Torque wrench to get inaccurate readings so I would not recommend using one.Air Filter: The Air Filter housing has one clip that flips up from underneath the front lip. There are two tabs on the backside that stick through two square shaped openings on the back and you’ll need to pull backwards on the housing until they pop through the square shaped openings, thus releasing the housing. The rubber hose simply slips off the hard plastic connector it is connected to.Oil Change: Run the motor (push the “manual” button) for about 5 minutes or so until warm and then push “Stop” to shut it down. Unscrew the cap from the flexible drain tube, and drain the oil into a container that you can later take to the auto parts store for recycling. I used a disposable Tupperware container and then transferred the dirty oil to an empty Orange Juice bottle with a screw cap. I put the old oil Filter in a ziplock baggie.Next, replace the Oil Filter. This is the messiest part of the job. I highly recommend unscrewing it by hand with several layers of paper towels under the filter and surrounding the entire filter itself as you unscrew it (lefty loosey). Put some clean oil on the rubber gasket of the new one and hand tighten until gasket touches and then tighten an additional 3/4 turn. Add 1.9 quarts of oil.Note: .9 quarts will leave approximately 3.2 ounces of oil in the bottle (Mobil One Oil has ounce markings right on the bottle). The oil dipstick has 2 holes in it. The oil level should be just above the upper hole in the dipstick (the oil is difficult to see but If you hold the dipstick at a slight angle to the light it’s easier). When full, replace the drain hose cap and put it back in the holder.Manually start the Generator and check for leaks. Lastly put the Generator back into “Auto” mode et Voila! You’re done for another 2 years!Note: You really only HAVE to change the Plugs and Air Filter every 4 years (they are schedule B items) but it’s so cheap and easy to do I do it every two years along with the other Schedule A items just for the sake of overkill. I enjoy overkill in case you haven’t noticed. 😉☝️This job was MUCH easier than I expected and in my case it saved me $350.00 (I live in California) and the hassle of having to be home to meet a Technician.Take your time and enjoy the process. There’s no better feeling than doing something for yourself and it’s nice to save a few bucks too! Good luck! 😎

Everything was very easy to install and made for my Generac 24KW It been about 3 weeks since I installed the maintenance kit and have had no problems. The system is 3 years old runs perfectly. The maintenance schedule is based on hours run I believe I have about 40 hours on the system which is an indication of low power outages. I do the maintenance annually just because I do not want any problems. This is my fourth Generac over 25 years as I move frequently and do not want my family to be burdened with power outages.

Reasonable price and includes everything! Way cheaper than having it serviced and I know the job was done well

This is a great idea: put all of the small parts one needs to do the routine servicing on a Generac large (999cc) home backup generator. There are several kits, some with all of the parts, some with only certain parts (i.e., no spark plugs), and some for other, smaller generators. Make sure you get the correct kit.I did my first maintenance using this kit (YouTube has some great tutorials). I did not need the spark plugs - they are to be replaced every four years or so - I'll hold them for the future. Everything was perfect. The parts are Generac brand, they all fit exactly as they should.I was very pleased with this kit, and can highly recommend it.

Good service kit at a good price

Ordered this kit for my Generac standby generator. Genuine parts for less money and works as they should. Will definitely order again when it's time for maintenance. Only issue I saw was the spark plugs should be packaged better so the ceramic doesn't get cracked (luckily mine were fine). Would still recommend the purchase.

This is the correct kit for my 2018 16kW model 70361 Generator with a GT-1000 999cc engine. I attached photos of what is included in the kit: 90mm Oil filter #070185E; Air filter #0J8478; 2 RC12YC plugs; a towel, paper funnel; instructions and 2 stickers.It's very important that you check the owner manual (on the Generac website if you don't have one) for your exact model and serial number to determine the correct plug, oil and air filter you need for your Generator/engine. Over the years, the 16kW generator has used a 992cc engine, a 999cc engine (my 2018 70361), and in 2019 they switched to an 816cc engine. Your Generator owner manual has a specification page and a replacement parts page that specifies what parts you need - it's better to go by those part numbers than the 'kit' numbers. Even though this kit says it is for a 20kW Generator, this is the correct kit for my 16kW unit.Realize this is the kit for the 400 hour service (good to have on hand). The annual and 200 hours service is just oil and oil filter, so it's cheaper to just replace the $9 oil filter, and just check the air filter. Also at 400 hours (and after the first 25 hours) the maintenance schedule recommends adjusting the valve clearance. When removing the valve covers, you should replace the two valve cover gaskets, which for my 999cc engine is Generac p/n 0C2979. These $1.85 parts are not included in this kit.I find working with Generac very annoying. When I called them, they would not even acknowledge the existence of kit numbers #6484 & #6485 - they will only provide the Generac kit numbers that have the same stuff, but cost over twice as much. Even though I provided my model and serial number, Generac still gave me the wrong kit number for a 992cc engine. Ziller Electric provides a cross-reference to the Generac part numbers and was helpful in clarifying what parts were in each kit.After the first 12 months, I noticed my oil is a bit milky (light brown), which means there is moisture in the oil. In a liquid-cooled engine this might mean coolant is leaking into oil, but this is an air-cooled engine, so that can't happen. The total run time of my Generator is only about 4 hours - just the 5-minute weekly start/run tests, which is done at a lower RPM. I've read online that milky oil is common with these generators and that running at low speed may not get the engine warm enough to 'burn' off the moisture so it accumulates in the oil. I may switch to a full-speed test for the next 12-months and see if that makes a difference - either way, it probably makes sense to check the oil monthly to see how long after an oil change the moisture accumulates.