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#572032 - 01/19/19 04:22 PM Impeller replacement  
Joined: Jul 2018
Posts: 2
KevinB Offline
Warrant Officer
KevinB  Offline
Warrant Officer

Joined: Jul 2018
Posts: 2
Forest Lake, MN
Greetings,

I'm going to replace the impeller on my new-to-me '95 Larson 174 sei with a Mercuiser 4.3/Alpha 1 this spring. Could somebody recommend a quality manufacturer/part? And is there anything else I should do as long as I'm at it?

Thanks

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#572034 - 01/21/19 12:23 PM Re: Impeller replacement [Re: KevinB]  
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Posts: 6,623
Dave R Offline
Admiral
Dave R  Offline
Admiral

Joined: Jul 2003
Posts: 6,623
Raymond NH
Buy OEM stuff (Mercruiser or Quicksilver brand), it's quite good and reasonably-priced. Buy an entire kit and new gear oil, don't re-use any of the wear parts. I think the kit is part number 817275Q05. It will last for years.

I'm not a fan of Sierra rubber parts.

Not much to check when you split the Alpha drive open, but you should check engine alignment, gimbal bearing, u-joints, bellows, and shift cable, and make sure the gimbal ring clamp bolts are torqued properly.

If the drive is only used in fresh water, you can replace the OEM aluminum alloy anodes with magnesium and reduce corrosion dramatically. After-market magnesium anodes are OK. This is a really good idea if you have a stainless steel prop.


"Mischief Managed II"
1992 Tollycraft Cockpit Motor Yacht
Twin CAT 3208TA inboards
#572043 - 01/23/19 09:58 AM Re: Impeller replacement [Re: KevinB]  
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captkevin Offline
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captkevin  Offline
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Chicago, IL
Agree with Dave on sticking with the oem replacement parts.


2004 Rinker 232
2010 Dodge Ram Crew Cab Laramie 4x4
#572074 - 01/25/19 02:29 PM Re: Impeller replacement [Re: KevinB]  
Joined: Jul 2018
Posts: 2
KevinB Offline
Warrant Officer
KevinB  Offline
Warrant Officer

Joined: Jul 2018
Posts: 2
Forest Lake, MN
Thanks for the advice!! Time to start buying some parts.


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