Antifreeze mixtures that contain more than 50-percent glycol can cause overheating problems with fresh water cooled Indmar engines, the manufacturer is warning. A consumer who is experiencing high engine operating temperatures or overheating at higher speeds and loads may have too much glycol in the mix. Other issues could also be the problem; water pump impeller, pinched hose and intake water obstruction.
Indmar diagnostic testing has shown that mixtures with more than 50 percent glycol raised coolant temperatures. As the mixture of glycol to water was increased, the risk of over-heating the engine was even greater.
Indmar uses Sierra propylene glycol for health and environmental reasons. Propylene glycol is as good, if not better than ethylene glycol. Some may argue the difference; however, there is no comparison when it comes to which is more environmentally safe. For example, many animals like the sweet taste of ethylene glycol. As little as a teaspoonful can be fatal to a cat and four teaspoons can be life threatening to a dog. For information and the benefits of using Sierra propylene glycol, go to www.sierraantifreeze.com/benefit.html.