cheap water pump fix

[darrylsiemer]

Probably the most common problem facing boat owners at the beginning of a season is that their outboard motor?s water pump no longer works. In most cases, the reason for this is that one or more of its pump impeller?s rubber ?fins? have taken a set (?permanent? bend) during the off season which prevents them from contacting the entire periphery of the pump housing when the drive shaft rotates. This prevents it from serving as a positive displacement pump at low speeds, which means that it can no longer prime itself. While the ?correct? fix is to find/purchase/replace it with a new impeller, an equally effective, faster, and much cheaper one is to simply grease it up and reinstall ?upside down?; i.e., so that its fins bend in the opposite direction than they did before.

This is how I?ve managed to keep my 1953 Evinrude Fleetwin 7.5 hp kicker going for the last two decades during which new impellers for it haven?t been available. (I'm aware that it's theoretically possible to grind/sand enough rubber & brass off a Sierra 18-3001 impeller to force fit it to pre-1954 Evinrudes & Johnsons.)

 

[WIMUSKY]

If I'm tearing it down to access the impeller, I'm putting a new one in......

 

[ondarvr]

Seems like questionable info is available in several different sections the last couple of days.

 

[boobie]

You're just lucky the blades didn't break off from reversing the impeller.

 

[flyingscott]

This has to be one of the worst pieces of information I have ever seen. A worn pump is a worn pump no fixing that. This is a case of to lazy or to cheap to fix it right. By the way that's not theoretical to grind out the sierra pump I do it for my 1953 TN 28 fits fine no forcing it. You are going to risk your motor on a $50 dollar waterpump. Save a dime buy a motor.

 

[82rude]

Ibelieve the poster believes an impeller is nla.If an impeller is no longer to be had for a motor what would you have them do?If one is made steer him in the right direction.i will look.

 

[82rude]

Would 1954 up fit?18-3202

 

[Hennysemitara]

Personally id just replace the impeller. Its not worth the risk to reuse it, and on my johnson it goes on only one way because it has a keyway

 

[HighTrim]

there are members of the aomci that produce NLA impellers. Simply place a wanted ad on the site, they will see it.

 

[82rude]

Info like yours High Trim is constructive,.. not personal attacks on the poor guy.I know ive been looking far and wide for a impeller for a 68 20 hp Chrysler and they only list 73 and above .If ones not to be had anywhere id certainly get inventive ,who cares as long as it worked.Maybe somebody will come on and say to the poster"no,no, a 1957 jig a ma jog will fit and work perfectly ,lol,if you get my point .As it stands I think he /she believes there are no other impellers to be had.

 

[ondarvr]

His statement was not directed at just his situation, his problem was mentioned later, the quote was "an equally effective, faster, and much cheaper one is to simply grease it up and reinstall it upside down".

There is only one part of his recommendation that might be true, and only for the short term. It is cheaper, but potentially far more costly if it fails. You will still needs to replace it rather soon, so why not just buy the impeller and only do the job once, and without the risk of failure. The equally effective and faster part are not accurate at all.

 

[flyingscott]

The biggest problem I have with his statement is he already knows which impeller fits in his motor he gives the part # and what to do. The Impeller he needs costs $12 available from BRP. What if somebody with a 25 MERC reads that and decides to do it and has problems. He is not asking which part fits his motor he already knows. He just gave a bad piece of advice that could easily cost you a motor.


Why risk your motor

 

[82rude]

Yes I have to agree after reading it again that can be taken 2 ways and the way you took it your response was accurate.

 

[WIMUSKY]

Seems like questionable info is available in several different sections the last couple of days.

I agree. He seems to go the "cheap" route, not necessarily the proper route....

 

[82rude]

Well I'm man enough to admit when I'm wrong, so my apologies flyingscott.

 

[interalian]

My $0.02: reversing the impeller that has a 'set' and probably also some stress cracks starting just puts stress on the opposite side of the blades. Repeat a few times and you will lose the impeller blade into water passages. False economy.

 

[darrylsiemer]

Since "Commander" Scott seems to be the most opinionated expert taking exception to this cadet's suggestion, folks following this thread might want to read the back & fourth we've been having about the same subject at *****************'s boating forum re thread " need impeller". http://www.*****************/boat-for...784#post550784

EDIT: The link is still blocked because it's a competitor..... Don't forget, iboats is 1st and foremost an online retail store. The forum is a by-product of the store......

 

[flyingscott]

Yeah he told me I was an idiot there. I put the same comment there that I did here.I take exception because it's a bad piece of advice they are not re-usable they are a disposable item. If you can't handle the truth about your suggestions don't post. Your cheap and easy fix could easily cost somebody a powerhead if they follow your advice. I stand by what I said I don't care where I put it.

 

[GA_Boater]

I didn't know the OP's intent but with the high likely hood for failure of a flipped impeller coupled with the electric fuel pump in the other thread, stock up on fire extinguishers and keep them at the ready.

 

[Faztbullet]

Real bad advise on both posts.........