By maxIV on Unrecorded Date: Edit

I know that there has been a lot of discussion about the Bosch +4 plugs lately. I finally found the ones for my max IV 20 h.p. I was just wondering how much difference in power they make? 5%? Do they affect speed or throttle response?
Thanks

By ISAAC EISENMAN (Tropicjungleboy) on Unrecorded Date: Edit

HEY MAX IV: i don't know about power improvement % ...but you can be sure that with bosch +4 simple install the best on today's market..final speed remain the same with same rpm on engine but crisp throtle response and maximum fuel eficiency....go for it!!!install bosch + 4 on your aatv's engine.....it's an inexpensive safety feature ( extra protection agains foul plugs due to carbon/oil/dirt)........so bottom line is that offer safetier bouncing trips!!!

By max iv on Unrecorded Date: Edit

thanx, i'm putting them in tomorrow morning. Then its time to test them!!!!!!!!

By Harry Dusseau (Dirtyharry) on Unrecorded Date: Edit

You should really notice how much easier it starts with the Bosch +4 plugs in it. The difference is especially noticable when the engine's cold. Warm-up time, with the choke half out is greatly reduced, also. And, yes indeed, you will find a crisper, much-improved throttle response.

A slick, quick, and simple way to increase the performance of your AATV. Well worth the $$$.

DirtyHARRY
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By Chris on Unrecorded Date: Edit

Guys, are these recommended during a burn in time as well? Or would it be best for my engine to continue to run the stock plugs for awhile?

By MaxRules (Brandon_price) on Unrecorded Date: Edit

Chris, it makes no difference. Use Bosch Platinum +4 #4418.

MaxRules

By weez on Unrecorded Date: Edit

what bosch+4 part number should i use in a 16 hp b&s engine thanks dave

By MaxRules (Brandon_price) on Unrecorded Date: Edit

4418 for all Briggs and Kohler v-twin engines used in the newer 6x6s.

By weez on Unrecorded Date: Edit

thanks for the info on the plugs

By chuck Ardizzone on Unrecorded Date: Edit

Hey has anyone tried this plugs in the Kawasaki fd620 found in the 2001 argo conquest? If so what is the part number. Thanks

Chuck