Bosch blue coil - good for my tractor?

the thing about more powerful coils is that yes they are capable of sending more power to the plug but say you replace a 5,000 volt coil and put a 100,000 volt coil in its place does not mean that it is now sending 100,000 volts to the plug it is only sending the amount of voltage required to jump the gap . which with a new plug and wire might only be 2000 volts but as the plug wears and the gap gets bigger and gets more combustion deposits on it the amount of voltage required to jump the gap increases . this is where the more powerful coil shines because the old coil can no longer efficiently jump the gap with the power its capable of putting out you get a no start condition or poor running engine at the least and the coil works harder to fire the plug eventually overheating and burning out but the new powerful coild keeps firing because it is rated much higher and is more than capable of producing enough spark to fire it still so if the old coil was inadequet with even a new plug and wire you will see a performance increase but if the old coil was adequet then you will not see any difference untill you get close to the tune up time with the old one

The main advantage to the Bosch blue ones is the epoxy filled windings,instead of an oil filled canister ,that can allow the secondary windings to rub together,and short out under the high heat and vibration found on small engine applications..the higher voltage is nice too,whether a small engine "needs" it or not is open to debate...I'd say just about any 12V coil is an improvement over the stock magneto one..

Tractor-Holic said:

The main advantage to the Bosch blue ones is the epoxy filled windings,instead of an oil filled canister ,that can allow the secondary windings to rub together,and short out under the high heat and vibration found on small engine applications..the higher voltage is nice too,whether a small engine "needs" it or not is open to debate...I'd say just about any 12V coil is an improvement over the stock magneto one..

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Thats it right there. The added output to help prevent missfire, fouling, is just a added bonis

You guys seem to think pretty highly of this product. So, I'm keeping the one Bosch blue that I have, and maybe I'll get a few more for my other tractors at some point.

I did some reading about the Bosch blue coil. It seems that the good ones were made in Spain, but you can't get those in the U.S. anymore. Next best are the ones from Brazil. That's where mine is from. I also read that the one's from Mexico are to be avoided.
Anyone else head that? mg:

Titanium said:

You guys seem to think pretty highly of this product. So, I'm keeping the one Bosch blue that I have, and maybe I'll get a few more for my other tractors at some point.

I did some reading about the Bosch blue coil. It seems that the good ones were made in Spain, but you can't get those in the U.S. anymore. Next best are the ones from Brazil. That's where mine is from. I also read that the one's from Mexico are to be avoided.
Anyone else head that? mg:

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I heard the same thing and read it also yes stay away from the one's made in mexico google bosch blue coil

I've heard that about just about EVERY product coming from countries like China,Mexico,etc,being "crap"..

I'm skeptical about those claims,while it MAY be true quality control is perhaps not a high priority in those countries,and they DO make some crap,I cant help but think maybe its just some disgruntled workers who lost their jobs to those countries who start those rumors..the "sour grapes" syndrome..

I bought some "China" tools many years ago,and yes,some were outright JUNK!--But,two I cant complain about, are a 2-1/4 ton floor jack ,I bought at a swap meet from a Oriental guy who spoke very little english--the jack has chinese writing on it and a picture of a bow and arrow,the only english writing is "2-1/4 ton" ,and some importers name on it..I have had it since 1986,it has never leaked,failed to lift any vehicle I put it under,and if the load is too heavy,it simply wont pump up--I ruined a nice "Lincoln" brand (american made!) jack that lacked that "overload protection" valve!..and I paid 55 bucks for it!..I think I got a good deal..

Another example is a 5 lb ball pein hammer I got for 5 bucks new at the same place..I have whaled on that thing with other hammers,used it to smash apart countless pallets for my wood stove ,and yet after 15+ years of abuse it has one tiny chip on its face,that happened when I used it to pound out a ball joint by hitting it with another 5 lb hammer--and I've never even broke the wooden handle on it..
I guess even the Chinese need SOME good tools to use ,otherwise they would never get anything built,right??..it cant ALL be junk..

Bosch isn't the only company making epoxy filled coils,Standard-Blue Streak and many other companies sell them too..you can probably find a MSD or Jacobs one or a similar "hot rod" brand in Summit Racing or Jegs catalogs for less than your local parts store might want to special order one..another option is to seek out cars that used them factory in junkyards,where you can probably get one for pennies on the dollar used..the junkyards are your friend,in tough times when you need good parts,but dont have lots of cash to blow on them..