Globe Marine Run-Dry Model 2000 Impeller for Mercury Marine 18-3087 & Mercruiser Inboard Bravo 1 with Keyway

DO NOT USE THIS PRODUCT!I’ve purchased an impeller sold by Globe Marine Products on Amazon on August 21, 2017 and installed In March 2018.The engine was commissioned in May 2018 at the beginning of summer sailing season.During summer sailing season I’ve experienced numerous problems with engineraw water pump self-priming after moving under sail with engine off.There was no water coming out of exhaust.Raw water pump is located bellow water line and no hoses, fittings or strainers arereaching above water line when the boat is leveled.In order to make raw water pump work, I had to loose pump cover plate to let air out,Sometimes it had to be done several times.I never had this kind of problem while using OEM impeller: 15 years of ownership with extensive cruisingBetween NY and Miami, Bermuda, Bahamas and Caribbean.Finally, while sailing South in October 2018, I was not able to prime the pump at all.A couple of miles offshore, I replaced Globe Marine impeller with used OEM impeller and everything worked fine!Has been sailing in various conditions for two weeks since and had no problems at all.If you examine attached pictures, you’ll see how badly Globe Marine impeller tips are wornComparing to OEM impeller with over 3 times as much usage.Also, I observed that the engine was running hotter above 2100 RPM (Volvo Penta MD17D, Max RPM 3000)Not exactly overheating, but closer to red than before)I suspect that because Globe Marine impeller blades are softer, they don’t seal as well as OEM,Which can contribute to weaker raw water flow and, therefore, higher engine temperatures.If you still want to try this product, watch exhaust water obsessively and monitor engine temperature.Make sure that you have time, sea room and ability to purge the pump or replace impeller when you start the engine.

This Impeller is Junk, it should not be used under any circumstance. I have a repair facility, tried to use one in a customers boat. It lasted 2 hour before failing. It was used under normal conditions and failed. It is made from a soft material and cannot take any heat, it just not sturdy enough. Stick with the factory type impeller made with rubber.