PCM versus Sierra versus Sherwood

Bottom line Bruce is IMHO yes. If you are aware of the possible problems you could use them and be fine. Marty hauled OOP’s to the river run one year. Don’t know if he had changed the impeller before he had left home,I think he did, but he had overheating troubles. He spent the whole day troubleshooting it rather than enjoying the run. He changed new impellers from the same source numerous times thinking it cannot be them. Finally Art gave him a Genuine Sherwood and his trouble immediately went away. Imagine dragging you boat some distance to hang with your friends but instead working on the boat. The money saved by not buying oem was sure used up 10 fold. If you get a chance compare a Sherwood to anyone else’s impeller.

PCM impellers are just re boxed/marked up Sherwood impellers. Look at the numbers near the hub (identical to out of the box Sherwood parts).

Sierra has had a sketchy past as far as quality goes but in the last few years they were bought up (among others) by the marine conglomerate SeaStar solutions. I would imagine their quality has gone up since then but who knows.

That said, I have seem some sketchy knock off impellers in my day. A few years ago I accidentally picked up one of these impellers for my dads GT-40. Thought i had a Sherwood in my cart but I didn't.Impeller. It is working like a top after its 3rd season.

I guess it just depends what you found?

Bruce,

Yes the Sierra impeller had flat surfaces on it. When compared to the PCM- the PCM impeller had a 1/16th raised ridge on the surfaces. Vanes, collar, etc.... This overall maybe 1/8th -from both sides helped to seal it. And guess what- from 2010- that same impeller is still in the Buick V-6 today.....

If we could figure out the shipping thing we could get the PN guys to send us their last seasons impellers- we’d be set for life   

Gary S wrote: If we could figure out the shipping thing we could get the PN guys to send us their last seasons impellers- we’d be set for life

hahahaha, I'd like to tell you I'd never taken a used impeller/ bilge pump / battery / other stuff from people whose replacement cycles are insane, but....

phatsat67 wrote: PCM impellers are just re boxed/marked up Sherwood impellers. Look at the numbers near the hub (identical to out of the box Sherwood parts).

This. Thought we had settled this a long time ago.

When I was at N3 I bought the Sherwood kits wholesale, market them up many more percent than PCM dealer percent, and still saved the customer money on the retail end.

PCM makes great parts but anything they just re box and mark up is silly.

Ribbed for Sherwood's pleasure.

I have a Walbro pump out of a 6.0 PCM. I pulled off the walbro numbers off that pump and called them. They could not find the spec’s of that pump or either could not give them to me. So they keep everything they can close.

Ken there looks to be no ribs out on each individual vane. This was Marty’s trouble. Would not have thought it true but I saw it first hand.

You can go through many dealers. What the Correct Craft purchase has done is you now have to go through a dealer . Before you could go direct. I have heard at one time buying direct would save you up to 40%. Dealers I’m sure did not like that. A guy on the Shamrock site who I bought a gt40 off of told me that, he used to do side work on boats in NJ.

Gary S wrote: You can go through many dealers. What the Correct Craft purchase has done is you now have to go through s dealer . Before you could go direct. I have heard at one time buying direct would save you up to 40%. Dealers I’m sure did not like that. A guy on the Shamrock site who I bought a gt40 off of told me that, he used to do side work on boats in NJ.

What's this I hear, new gt40 for the shamrock or are you just building up spares..   It is getting to be about the time of year where I could be convince to stop on down and hold your beer while you install an engine.

my experience with Sierra which admittedly is a bit dated but otherwise extensive is that you never knew what was going to come in that Sierra box ... they don't manufacture most of the 6000+ parts that they sell they source them and sometimes the sources change for the better and sometimes for the worse.   

Before the intertubes getting a part for an old obsolete bit o marine goodness in a reasonable amount of time usually involved it coming in a sierra bag or box or direct from a dealer. . Napa was also a factor but they sold sierra parts in addition to the napa labeled parts.    

[QUOTE=JoeinNY]

What's this I hear, new gt40 for the shamrock or are you just building up spares..   It is getting to be about the time of year where I could be convince to stop on down and hold your beer while you install an engine.

Far from new but new to me Joe,it needs a going through. You are more than welcome anytime. The story goes that someone with a Nautique in Texas scuffed a piston I was told. He started accumulating parts,new heads new injectors,new Cam Research cam etc- then found a take out gt40 and went that route instead. A Shamrock guy who lived in NJ bought it then moved to Jacksonville with it where I picked it up in November and hauled it back to Illinois, so it's got alot of miles It is a late model with the 300 tune. When I get home in the spring I'll start going through it and see what it needs. Only thing I have not found in the boxes is the knock sensor which isn't to bad considering as you know alot gets lost.

I have had 2 "New" non ribbed impellers just like that including slots not work in two different pumps.

Maybe a freshy fresh pump housing and plate don't care about the missing ribs. Who knows.