U.S. 41 engine starting
 

[:@][:@][:@] This sucker just won't start worth a darn.. Even with a starter that turns it over really easy..We just can't seem to find the right way.. any help appreciated.. thanks[:@]

RE: U.S. 41 engine starting
 

jwnge,

Take a step back and check a few of the basics. These engines are hard to keep from running when everything functions as it should.

First, check that you are getting spark. Pull the spark plug, connect it to the lead and ground it to the engine case (make sure the engine kill is disconnected). Spin the prop and look for spark. The spark may be weak at low RPM and this is usually due to clearance between the coil and flywheel magnets. You should just be able to get a business card between them.

Second, make sure you are getting fuel through the carb. If it will run, once finally started, this is usually not the problem. But, if you have any doubt, check the fine screen behind the diaphragm and make sure it is clean.

GOOD LUCK!

Bedford

RE: U.S. 41 engine starting
 

Like Bedford said, these motors are pretty fool proof. Mine usually starts on the first flip.

Kill switch in the off position.

Put hand over carb, throttle half open and turn it over by hand until fuel is in the carb.

Throttle set to idle, kill switch set to run position.

Wind the prop 1/2 turn backwards and slide hand off the end of the prop and presto, it's running. (Mine has the spring starter).

RE: U.S. 41 engine starting
 

The gap between the magneto and coil should be .020 " according to US. The plug should be 035". Good Luck.

RE: U.S. 41 engine starting
 

This belongs to a friend I fly with. It is on a Dynaflite Decathalon.. With the plug out and grounded, turning with a starter, it has good spark. It seems no matter where the throttle is set, it makes no difference in starting.. We will check the distance to see if it is around .020 for the mag.. It , when started, runs really good, idle and at full throttle in the air.. oh, it has no spring for starting, just a big belt driven starter is used. I wonder if it might be turning too slow..thanks, John

RE: U.S. 41 engine starting
 

I have a Q42 which is the forerunner of the US engines. It must be really wet (gas in the cly.) in order to start. Mine has a spring starter and starts first time everytime. The spring starter broke one time and it took me two weeks to get a replacement, I tried I bet 50 times in those 2 weeks to start that engine and never could, put the new spring on, first flip, Varooooooom.

RE: U.S. 41 engine starting
 

Kind of makes me think it needs more speed from starter to start:eek:

RE: U.S. 41 engine starting
 

US Engines is selling the spring starter assembly for $39.95.[link]http://www.us-engines.com[/link]

RE: U.S. 41 engine starting
 

Tell your buddy to buy one & a replacement spring. It's the best $40.00 he has ever spent, that didn't come in a bottle.

RE: U.S. 41 engine starting
 

1) Try a fresh new plug properly gapped.
2) Try loosening the plug to relieve the compression a bit, IE faster turnover. If it fires let it run a minute, shut down, tighten plug and try restarting. Works for me but on different engine.

RE: U.S. 41 engine starting
 

Use a business card to set the magneto gap. It should be tight! Open the throttle fully, choke till wet. CLose the throttle to idle, ignition on, and flip it hard. Never seen a quadra yet that would not hand start. 35's, 50's, 42's, 75 magneto...all hand started fine. If you flood it, the plug will gas foul pretty easy. The spark will be weak and not between the two electrodes if it is gas fouled. It could look just fine, but trust me when they are gas fouled, throw them out.

RE: U.S. 41 engine starting
 

If you have spark and the filter is not cloged, then it is insufficient prime. Put you finger or thumb over the throat of the carb and turn it over (with kill switch activated) until you literly have fuel all over your thumb--very wet. Turn off kill switch and should start on next try or two.

RE: U.S. 41 engine starting
 

That is how I start mine.....always starts right up. I use the spring starter I have never tried to start it by just flipping .probabably should . If I can off the spring start its a pound saved.[X(]