I run a 1990 200 Yamaha with 1500 hrs. I do alot of slow going which results in engine bogging down on acceleration for a bit until I get above 4200 rpm for a minute or so. I believe its carbon buildup and plug fouling. Yamaha Ring Free is $8.00 per bottle, and to do a shock treatment on a 60 gal tank is way to expensive. I have seen Techtron/Chevron fuel injector cleaners in auto parts stores for $3.00/bottle. Any danger in using this as a cheaper alternative?