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Engine Tuneup for Generac Wheelhouse 5500 / 5550 Portable Generator

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I don’t use my portable generator that often, other than maybe testing it once every month or two, so in my opinion it is critical to perform an engine tuneup at least every 12 months.

If you found this article via search engine, you may want to read Fast and Easy Fix for Your Generac Wheelhouse 5500 / 5550 Portable Generator (Part 1) and/or Part 2

TOOLS

Thankfully, no special tools are required. I do, however, recommend a siphon to drain the gas:

PARTS

ENGINE TUNEUP

  1. Disconnect the spark plug cable;
  2. Remove old gas using a liquid siphon; I don’t recommend tipping your generator to empty out the gas because it can get messy and I do not want my electronics to soaked with gasoline;
  3. Drain the used oil by tipping the engine at about 30 degrees;
  4. Replenish with new engine oil;
  5. Replace the air filter;
  6.  


     
  7. Remove the old spark with a new Champion spark plug with gap set to 0.030;
  8. Add fresh fuel (preferably premium or 93 octane gasoline);
  9. Add Sta-Bil to new fuel and let is sit for 30 min;

PARTING WORDS

Using synthetic oil is probably an overkill, but it allows me to use the same engine oil throughout the entire year (and it is supposed to make the engine last longer) so it’s a worthy investment for me.

Thanks for reading and good luck with your tuneup!

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Gary

Tuesday 5th of September 2023

need the two (2) bolts that hold the carburetor on, there can I get them?

kevin

Tuesday 5th of September 2023

here you go...https://allthumbsdiy.com/go/briggs-stratton-691672-generator-carburetor-hold-down-bolt-stud

Dave in Southwest PA

Wednesday 5th of April 2023

I have the Briggs & Stratton WheelHouse 5550. Put Ethanol-free gas in at the beginning of the pandemic and did not need to use it until this past weekend wind storm knocked power out for 15 hours. Took three pulls and fired right up. I ran it intermittently to pump the well (water), cistern (water) and our septic pump mainly....then would turn the refrigerator and freezers on for an hour or so throughout the down time. I bought this generator in 2005 and still going strong!

Dan Castle

Monday 22nd of February 2021

Thanks Kevin. Just trying to do the first real maintenance on it that I know of. I purchased it used 6 years ago and the only thing I have ever done is put a little fuel in it once per year, start it until it runs out of gas, and then put it away. Now I just used it for several days and nights in a row during the TX power outage. I want to make sure it runs well the next time I need it and I noticed I was having to run it on half choke. I am replacing the air filter which appears to be much of the problem. Also replacing the spark plug now. My big problem is I cannot get the carburetor bowl off because one of the screws is rusted on. I want to clean it out. I also can't get the idle screw to turn without almost stripping out the head.

Dan

Monday 22nd of February 2021

I found the owners manual for the generator but not for the engine. Do you have a link for it? Also, how many quarts of oil does it require?

kevin

Monday 22nd of February 2021

Hey Dan-

Unfortunately I was never able to locate the engine manual.....engine takes slightly more than 1 quart so after draining and capping the plug, add oil about 3/4 quarts then check the dipstick before adding more.

Did you have a specific problem with your engine?

Kevin

Paul Davenport

Wednesday 3rd of October 2018

Thanks a bunch for the info ~~ I am prob behind a few years , but still working with the 5500. I tried to print the owners manual , but NO print. Do I need it? The springs and wire parts are all rusty ~~ I wonder how to handle that ~~ none in two , but rusty ~~ I wonder if any spring replace kits to care for this? Whats to do? It would be better to for ME if You would use direct e-mail [email protected]