Ayuh,..... For those of Us who aren't runnin' Mega-Power boats, just the run of the mill Alphas, Bravos, Volvos, whatevers,...

I've found the Globe impellers are the Greatest thing since sliced bread,.....

I'm runnin' an Alpha 1, 'n it's Globe impeller is pushin' 10 years,....
I'm a Mechanic, 'n I'll keep an eye on it, 'n pull the lower, when I think it's gotta be done,...

With the Merc, or the Sierra black rubber impellers, 3 years was the MAX, period,.....

My ole tin fishin' barge sits at my dock from May to late Oct. maybe early Nov., 'n has for 9 seasons now,....

I can't say how long a Globe impeller lasts,.... ain't replaced a used 1 yet,.....

I had good luck with the Globe as well. Ran one on my stock 454 for over 5 years with no problems. Only reason I took it out was that I was having problems getting water pressure running on the hose after installing the new engine. Problem turned out to be an air leak where the inlet hose attached to the transom assembly. I still have the blue impeller as a spare - it looks perfect other than having a slight set to the vanes. This was run in a boat that saw frequent use in shallow areas with sand bottoms.

I did notice slightly lower water pressure with the globe, and the engine ran a little warmer, but those Merc pumps usually run way more water flow than is usually needed for most engines anyway. Many of us are actually dumping excess water flow overboard.

I read somewhere that Globe had changed manufacturing facilities some time ago and some people were having problems with the hubs tearing out of the impellers. I guess I had one of the "good" ones made at the old facility. That's the main reason I haven't ordered another one. Tempted to put my old one back in and see if it will go another 5 years!