Export thread

What are your thoughts on resistor vs non resistor plugs for mower engines?

None of mine have computers nor EFI. Not interested in "but non resistor plugs generate RFI". Not interested in locomotive engines or Ninja mixer engines either.

Can one plug or the other cause poor idling like issues? Running rough at low revs?

Guess the only way to tell is swap in a new plug and see how she runs. What do you guys think?

slomo

A resistor plug will deliver a higher voltage to the plug gap than a non resistor so will be less likely to track down the side of the electrode
Resistor plugs put a greater load on the magneto
Makes 5/8 of SFA difference to mowers but a big difference to trimmers & chain saws cause the spark will be a poofteenth out of time if you use the wrong type of plug .

Just don't live near me or I hunt you down like a varmint especially when you start interfering with my radio communications. I got enough problems with electric fences. I might even have to put the engine out of my misery.

StarTech said:

Just don't live near me or I hunt you down like a varmint especially when you start interfering with my radio communications. I got enough problems with electric fences. I might even have to put the engine out of my misery.

Click to expand...

Put the CB mic down and enjoy life. Same with your facebook. I bet you watched Contact and bought a CB radio? Or the movie Convoy, breaker 1-9, breaker 1-9, anybody got a smokey report? LOL

slomo

slomo said:

What are your thoughts on resistor vs non resistor plugs for mower engines?

None of mine have computers nor EFI. Not interested in "but non resistor plugs generate RFI". Not interested in locomotive engines or Ninja mixer engines either.

Can one plug or the other cause poor idling like issues? Running rough at low revs?

Guess the only way to tell is swap in a new plug and see how she runs. What do you guys think?

slomo

Click to expand...

Is the engine manufacturer's recommended spark plug hard to get? If not I'd just go with what's recommended. If its hard to get then go with the alternative.

slomo said:

Put the CB mic down and enjoy life. Same with your facebook. I bet you watched Contact and bought a CB radio? Or the movie Convoy, breaker 1-9, breaker 1-9, anybody got a smokey report? LOL

slomo

Click to expand...

Ain't you just a "good buddy".

slomo said:

Put the CB mic down and enjoy life. Same with your facebook. I bet you watched Contact and bought a CB radio? Or the movie Convoy, breaker 1-9, breaker 1-9, anybody got a smokey report? LOL

slomo

Click to expand...

You lose that bet. I initially brought 11 meter rigs to communicate with my home but quickly found the range severely limited so I when on the 2 meters with a 100 mile range with the repeaters and auto patch.

Don't be insulting me...I am actually a General Class Amateur Radio operator studying for my Extra Class license. Shouldn't be too hard to pass it since they dropped the code requirement. You try listening to 10 meter CW at noise floor just to have some idiot with a illegal RF amp on 11 meter key the darn mike as they pass your station.

Yes I started out on 11 meters but I quickly more to the Amateur bands as soon as I passed 5 wpm Technician Class license requirement and a year later I passed the 13 wmp code test for my General Class license. We actually got a code ethics unlike the 11 meter bunch.

As for Facebook and Twitter I flat refuse to join those groups.

QRQ 20 IMI K.

I have a hard enough making to 13 but I do know can read faster than 20. They actually translate in their heads as if it was a second language. My hearing just will not let me get much above the 13 wpm even than I no longer write it down down long hand. My top translation is around 15 currently and getting rusty again have been on 80 or 40 meters in a few years as the antenna is still down since the move.

I was really surprised I knew what was sent as they want to see my notes and all I had wrote down was the highlights. It was strange I knew all the answers to the question about the QSO.

When i joined the army i went to military intelligence basic morse school. You got 13 weeks to be able to copy 18 WPM. Wash out rate was 50%. You sat 55 minutes per hour copying code 8 hours a day 5 days a week for 13 weeks. In my prime i could copy 22 WPM of canned code. But that was 40+ years ago.

Hammermechanicman said:

When i joined the army i went to military intelligence basic morse school. You got 13 weeks to be able to copy 18 WPM. Wash out rate was 50%. You sat 55 minutes per hour copying code 8 hours a day 5 days a week for 13 weeks. In my prime i could copy 22 WPM of canned code. But that was 40+ years ago.

Click to expand...

I probably would have wash out. I tried tapes and classes but got no where with it. I finally order a Heathkit CW keyboard kit and then I finally got the hang of it. IT still took a year after getting the keyboard. When went to take my technician test I passed on the first try. I even passed my General test the first time but boy was I worried about my code coping skills.

My first real contact was on 80 meters using my spider web antenna sitting my room. It took over 30 minutes but the guy on the end was patient with me. Code don't seem to have the language as do voice contacts but I still ask what the sender means at times.

Right now the spider web will work as I got GFCI plugs. I still to get off my butt and try the shop plugs; although, I am fairly that they are the problem.

Soon you may not have a choice. NGK already stopped making non-resistor plugs.

I have used both resistor and non resistor plugs j19lm and rj19lm in push mowers and never saw a difference. Some guys see a difference in hand helds. I pretty much use resistor in all 2 strokes any more. Can't remember last time i ordered non resistor plugs for OPE. I do run nonresistor champ D21 plugs in the 184 LoBoy. Back when i was building WKA 5hp briggs a resistor plug gave about one degree of retard over a nonresistor plug.

Hammermechanicman said:

I have used both resistor and non resistor plugs j19lm and rj19lm in push mowers and never saw a difference. Some guys see a difference in hand helds. I pretty much use resistor in all 2 strokes any more. Can't remember last time i ordered non resistor plugs for OPE. I do run nonresistor champ D21 plugs in the 184 LoBoy. Back when i was building WKA 5hp briggs a resistor plug gave about one degree of retard over a nonresistor plug.

Click to expand...

What is because the voltage required to jump the same sized gap on a resistor plug is higher so the magnets need to get just a touch further into ( or out of ) the coil before sufficient voltae has been generated.
Would not have thought it was a full degree at mower revs.
I have gone to the effort of putting a dot on a trimmer flywheel with a corresponding one on the magneto leg to show a customer just how far out of time a non resistor plug is in his engine.
It was overheating because the plain plug was firing too early at 8000 rpm & could not get to 9000 like it should .

The one degree difference was at about 6000 RPM.

Oh
Not quite a std B & S engine then

You can take a stock 5hp briggs 130232 engine and remove the govenor and replace the oil dipper with a better one and the engine will happily turn 6500RPM and not break. Most racers geared their carts to top out at 6000 to 6200 RPM. The weak link is not the rod but the valve guides wearing out. We double stacked brass replacement guides to fix that problem. Adding a tuned header pipe and bumping up the timing with offset keys adds a little bit more power. This is with the stock cam and carb.