Beru Ignition coil

[zkoester]

Well a while back I posted about finding the best coil in todays world…

That’s when I found out through here that the Blue Coil from Bosch was discontinued and I believe it was Kirk that confirmed he no longer could get this through his business.

So after a cheap Scamazon coil and it failing I did some more research and did some Rock Auto hunting. Hopefully this Beru works out. Covers all the specs so guess we will see how it goes.

 

[jbratton]

Let me know for sure!

 

[mgerecke]

How do you find that on Rock Auto? Seems like they always want a vehicle to fit it to.

 

[dschwandt]

Does it have an internal resistor?

 

[eweiss]

Been using a gm 12v coil with a resistor for many, many years

 

[bjames]

Does it have an internal resistor?

Yes, they are rated at 3.3 Ohms. Made in Mexico for the North American market. Oil filled.

https://www.rockauto.com/en/moreinfo.php?pk=5472996&cc=0&pt=7060&jsn=3

 

[zkoester]

How do you find that on Rock Auto? Seems like they always want a vehicle to fit it to.

I started doing some back searching on older forms and reading up on what people were using. Found older Volkswagen models with points used the right ohms needed

 

[zkoester]

Does it have an internal resistor?

I was doing some reading and most say there’s no such thing as an “internal” resistor but more or less comes down to the winding’s internally if I remember correctly. Just comes down to finding the correct resistance output.

 

[hdeloach]

also listed on e-bay

 

[dkirk]

Here is the coil I recommend. Specs are identical to the Bosch Blue, including the epoxy fill:

https://www.jegs.com/i/Pertronix/751/40611/10002/-1
This is considered a high-vibration coil that should be ideal for a garden tractor. The 3.0 ohms primary resistance is perfectly suitable for breaker point ignition without use of an external ballast resistor.

Remember, it's the coil's turns-ratio that determines the primary resistance. Contrary to popular belief, there is no such thing as a coil with an internal resistor. Resistance is due to the length of wire in the primary winding, gauge, and turns ratio, secondary/primary. Any coil with a primary resistance lower than 3.0 ohms draws more primary current and this will drastically reduce operating life of the points.

 

[zkoester]

Exactly

 

[zkoester]

Here is the coil I recommend. Specs are identical to the Bosch Blue, including the epoxy fill:

https://www.jegs.com/i/Pertronix/751/40611/10002/-1
This is considered a high-vibration coil that should be ideal for a garden tractor. The 3.0 ohms primary resistance is perfectly suitable for breaker point ignition without use of an external ballast resistor.

Remember, it's the coil's turns-ratio that determines the primary resistance. Contrary to popular belief, there is no such thing as a coil with an internal resistor. Resistance is due to the length of wire in the primary winding, gauge, and turns ratio, secondary/primary. Any coil with a primary resistance lower than 3.0 ohms draws more primary current and this will drastically reduce operating life of the points.

This is exactly what I said in my one comment above but in greater detail and I appreciate that lol. Finding a coil that worked just took a little time and research!