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General Info on Paramotors

Most paramotors share a common design.  If you cannot find the info you need below, check the specific sections of your particular engine.

Assembly of a paramotor – here are the basics

Bearing condition – What condition are the bearings in my engine?  Which one is the most likely to fail first?

Bearing replacement and case assembly – If this is done incorrectly, you will ruin the case

Belt adjustment – How to adjust the redrive belt on any engine

Breaking in a new engine – a new engine generates more friction than usual.  It MUST be broken in carefully so it will last.

Carburetor Dimensions – by Gerry Farell – This information compares the dimensions of the various Walbro carburetors and is helpful if you are considering upgrading from the WG-8 to another Walbro model such as the WB-37.

Carburetor performance tuning – see "Performance tuning" below

Case assembly – see "Bearing replacement and case assembly" above

Cold weather operations – Unfortunately, the WG-8 and, to a lessor extent, the WB-37 are very sensitive to both high altitude and/or cold weather operations.

Compression check – One of the best ways to quickly check the overall health of an engine.

Crankcase pressure test – The only way to be sure the main seals and various gaskets are not leaking.

Cruise control – Not a good idea and here is why (page down to the end for this information).

Cylinder head temperature gauge – Not having a CHT is like driving a car without any gauges or warning lights. Most of the time you don't need them....

De-carbonizing a two stroke engine – Alex Varv shows how to do it without removing the cylinder

Engine performance issues – see "Performance tuning" below

Exhaust port oil leaks

Frame cracks – see "Metal fatigue" below

Fuel & oil specifications – Pilots must use the correct gasoline and oil for long engine life

Fuel system equipment – See section "A" of this link.  What do you need to safely fill and drain your tank?  Oil mix bottle?  Storage tank sizes?

Fuel filter – Unfortunately, the fuel filters that auto stores stock are poor quality.  Here is the information you need.

Fuel mixed? – Is there oil in the gasoline?

Fuel system leaks – A rare but annoying problem

Fuel system quick test – See the "Quick fuel system test" in section A of the link

Fuel system test – A more thorough test of the fuel system.

Fuel tank leaks – How to fix most factory defects.

Harness adjustment – This is for the Miniplane Top 80 but works for most other harnesses.

Harness strap repair – Thin, tall pilots routinely experience buckle breakage on some harness models.  Here is a simple fix for the problem.

High altitude use – Pilots can improve performance at high altitudes and/or cold conditions by modifying the WG-8 and WB-37 carburetors.

Ignition timing – How to accurately set the timing on most paramotors

Ignition timing check – This method will give the precise timing value that 100% mechanical methods are unable to do.

Kill switch problems

Leaks, oil or air – The Top 80 leak page can help you identify where the leak is coming from and what type of leak it is.

Metal fatigue – Pilots who put 100's of hours on any paramotor must keep an eye out for this hazardous and hard to see problem.

Midrange performance issues – see "Performance tuning" below

Mounts, engine – Mounts must be checked often.  If you replace them with the Viking mounts, do not make the mistake this pilot made.

Muffler springs – Use paraglider line to stretch the springs for replacement/removal.  Do NOT use pliers to stretch the springs because
    this will nick the tempered surface of the spring and weaken it.  Here is a video on how to properly do it

Oil leaks – see "Leaks, oil" above

Overhaul – see "Rebuilding 2 cycle engines" below

Overheating – This will destroy an engine.  What causes it?  How is it prevented?

Performance issues – Does your engine run poorly, roughly, or with a lot of engine vibration?  This page can help.

Performance tuning – Most paramotors run poorly in the midrange (where it runs most of the time).  The Walbro carburetor can be safely modified.

Piston ring – How to tell if the ring needs replacement

Priming a paramotor – see "Starting a paramotor" below

Propeller hub removal & installation – how to get it off and on without wrecking it.

Propeller Info – General information including how to correctly balance, attach, and repair it.

Rebuilding 2 cycle engines – When is it time?  This general and helpful article from Utah Motor Trails can help you decide and gives the basics on how
     to do it.  The upper connecting rod bearing in a well-taken care of engine will likely be the first part to fail.  Here are some good tips from MCB
     Performance on rebuilding two-stroke engines.  Splitting open the engine case is a very technical job and requires special tools that will not
     destroy the case halves.  Go to this page for information on how to remove and re-install bearings and the correct way to seal the case halves.

Reed valves – Info on how to check them and replace them, if necessary

Sidestick mount protection – The sidebars and sidestick mounts will grind away on each other.  Here is a fix.

Smoke systems – Pilots must be extremely cautious when installing smoke systems on any 2 cycle engine with a tuned exhaust and here is why.

Spark plug info – Meaning of the NGK part number

Spark plug cap replacement – It is not that simple if you want it to last and work well.

Spark plug installation

Spark plug reading – How to do it.  A cylinder head temperature gauge (CHT) is essential and will confirm what the observed condition of the
     park plug.  Also see "Electrical troubleshooting" above.

Speed system pulleys – pilots are plagued with the poor quality, high friction Viadana pulleys from Miniplane.  What's a good replacement?

Spring removal and installation – see "Muffler springs" above 

Starting a paramotor – with this technique, your engine will start with the first pull every time.

Stuttering in the midrange – see "Performance tuning" above

Tachometer – Is your engine due for routine maintenance?  Has power output changed?  You won't know without a tachometer/hour meter.

Threadlock – An important item in a pilot's toolbox

Throttle cable – Cleaning, important modifications, and cruise control info.  For kill switch issues, see "kill switch problems" above.

Throttle placement in the hand while launching a paramotor


Tools – Paramotor essential tool kit  The list here is from Harbor Freight of the U.S.A.  If you live elsewhere, you may pay a lot more for these tools.

Torque Values – This is the Top 80 specification page which has a thorough torque section.  Hit "page down" twice to see it.

Tune-up – Here is how to tune up the Walbro carburetor

Walbro WG-8 carburetor – This info can also be helpful for other models that have a fixed main jet.

Walbro WB-37 carburetor – This info can also be helpful for other models that have an adjustable main jet.

Vapor lock – This is a serious problem with all paramotors that have the tank mounted below the engine.  See our page on fuel and oil specs for more information on this issue.