FAQs

Frequently 
Asked Questions 

Your top ten questions about small engine repair and maintenance

If you have a question that isn’t answered here, give us a call at 877.886.3638. 
Or shoot us an email. We’ll get right back to you. 

1. Who are the Mobile Repair Guys? 
The Mobile Repair Guys, LLC, is a group of locally owned and operated small engine maintenance and repair franchises. We are based in Southeastern Wisconsin, and we service equipment at your home or place of business. This business was started by a couple of guys who saw the need to create a small engine repair service that took the hassle out of dealing with conventional shops. Our primary goal is to make it both easy and cost-effective for you to get your power equipment serviced. 
2. What is included in your advertised tune-up price? 
Everything for the tune-up is included in our low advertised price. The Mobile Repair Guys never charge for unlisted extras. We bring everything we need for the job in our fully-stocked trailers. In the case that your unit needs a part we don’t have, we’ll get it to you in a matter of days and finish the job at no extra charge.
3. Do I have to pay an extra pick-up or delivery charge? 
No! This is the entire premise of our philosophy. We come to you and do the work at your site so there is no pick up or delivery charge. If your equipment requires parts that have to be ordered, or we need to take the unit with us, there is no extra trip charge. You just pay for parts and labor.
4. What type of oil should I use in my small engine? 
Not all motor oils are the same. To put it simply, in warmer climates, most engines need thicker oil. In colder climates, most engines need thinner oil. Oil is measured by its thickness or viscosity (how fast if flows). For example, 40-weight oil is thicker than 30-weight oil. The “W” in 10W40 stands for winter, which means that in winter, this particular oil behaves like 40-weight. Using the wrong oil can cause problems with starting and poor gas consumption. 
5. How often should my lawn mower, tractor or snow blower be serviced? 
Most manufacturers recommend servicing your equipment at least once a year. All small engines use petroleum-based products. As the additives in the petroleum break down and the oil and gas is left to settle over long periods of time, it can cause sludge and a gummy residue. This residue can cause engines to “hunt and surge” or, worse, break down. Also, the sludge can block key lubricating points resulting in rapid and excessive wear. Eventually, the engine could become completely ruined. 
6. How often should I sharpen my mowing blades? 
Sharpening cycles depend on the conditions encountered by the mower. In sandy or very dry conditions, the blades may need sharpening every two to three hours. At a minimum, the blades should be checked and sharpened, if necessary, before each day of operation. Tip: Keep an extra set of sharp blades handy to replace those that become dull or damaged during daily operation.
7. What type of oil should I use in the hydraulic system? 
Any high-quality 15W40 fully synthetic motor oil can be used. 
8. How often should I check and service the hydraulic system? 
Hydraulic oil should be checked daily. Make sure the top of the tank is clean before removing the fill cap. Oil level should be one inch below the top of the tank. The hydraulic oil and filter should be changed every 500 hours, or once before the mowing season. Instructions for the oil and filter change can be found in the operator’s manual. 
9. Can I turn or space the wheels on my riding mower for a wider stance? 
No, the drive wheels should not be turned around. The rims are designed with a specific offset to center them on the wheel motor, plus the valve stems would be on the inside of the wheel, making it difficult to check the air pressure. Do not attempt to space the drive wheels for the same reason. Any wheel offset or wheel change could result in broken wheel motor shafts. 
10. How can I correct poor discharge or uneven cut? 
Poor discharge is a factor of blade tip and ground travel speed. Always mow with the engine operating at full speed. Regulate operation control with ground speed. At high ground speeds, the blades cannot cut the grass efficiently. When grass is high, slow down your ground speed. Never cut more than 1/3 of the grass height. In high or lush grasses, the mower should be operated at its highest level of cut, and then re-cut at the final desired height. Uneven cut can be due to something as simple as incorrect tire pressure. Check your operator’s manual for correct tire pressure. Poor discharge and uneven cut can also be caused by damaged, unbalanced, or dull blades. Grass build-up under the deck can damage or wear the deck belt. Check the operator’s manual on how to correctly set the cutting height of the deck.

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