impeller good or bad

6/14/10 @ 4:34 PM
ORIGINAL POST
Quagmire
Quagmire
USER since 6/3/08
the motor used to pee water out good, then all of a sudden one day it was just a trickel, i tryed flushing it. so today i dropped the lower unit and took out the impeller. it doesnt look great, but not bad either. it fits real tight in the pump houseing. is this impeller bad? water was barely coming out. i went home cuz i was afriad it was gonna overheat.

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Displaying 1 to 10 of 21 Posts
9/19/10 @ 8:43 AM
Mr. Fish 2
Mr. Fish 2
USER since 9/24/05
ALWAYS, ALWAYS, turn shaft clockwise when impeller is installed.

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9/17/10 @ 10:23 PM
Shagnasty
Shagnasty
USER since 1/26/06
OK...just so I am sure...

No special tools, just mechanical aptitude. I will look for the online tutorials.

Shag

Edited on 9/17/10 10:47 PM
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9/15/10 @ 5:51 PM
muskie-addict
muskie-addict
USER since 6/9/02
why would you go thru the trouble to pull it out and not replace it.

Ding, ding, ding!!! Give that man a cigar. Best sentence on here.

Ya got the thing out already, if you have to ask or its been a few years......just do it. The hard part is done, or, half of it anyway.

Steve's advice on changing them out every 3 years is probably a good idea.

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9/15/10 @ 5:13 PM
Ron G
Ron G
MEMBER since 7/2/04
1. change the impeller.

2. Run a light weight wire through the hole to make sure it is clear.

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9/15/10 @ 4:57 PM
ffishman
ffishman
USER since 11/3/03
Do it yourself. Its not that hard, and there is a ton of demo's on line on how to do it.

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9/15/10 @ 2:30 PM
Steve @ G & S
Steve @ G & S
MEMBER since 6/15/01
If you take care and watch exactly how things came apart, and you're fairly mechanically apt, you shouldn't have any problem with changing out the impeller.

I change out the entire pump assembly every three years on my outboards, and I've never had any problems either with handling the repair or with the motor overheating.

Formerly Steve @ G & S

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9/14/10 @ 8:53 PM
Shagnasty
Shagnasty
USER since 1/26/06
Been wondering about this subject...I have a 2007 Opti 115 that still pees like crazy, but I have almost 115 hours on the motor. No problems with sucking mud or dirt in because I am pretty careful. I have heard that the impeller should be changed every 3 years. So here's my impeller question:

Is it something I can change myself (fairly mechanically inclined) or do I bite the bullet and haul it to the dealer?

Shag

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6/16/10 @ 8:18 AM
'da Coach
'da Coach
USER since 12/23/08
Ditto the comments about replacing the pump, I just replaced the water pump in my '93 40HP Mariner Magnum (with great input from ml2trick, thanks again, BTW!), so now I feel like an "expert", lol.

In my case, the dealer I bought the boat from six years ago said they'd replaced the impeller when they took it in on trade, and it performed well up until this spring. When I threw on the earmuffs and fired it up in the driveway this year, the water was trickling out of the tell-tale hole and was too hot to the touch (@ 130 degrees). Since I hadn't addressed the water pump since I bought the boat, I figured, rather than replacing the impeller only, which would run @ $20, I'd be better off getting the whole pump housing kit (@ $75), which included gaskets as well. That way, I knew I'd have a definitive baseline of exactly what was replaced when.

Since this was my first go at pulling a LU, it took me a bit longer than it normally should, but overall, not too tough a fix, and now that it's done, the pump is running well and there's a robust stream of water pumping out of the tell-tale hole.

Do yourself a favor, as these other guys have posted, don't take a chance on damaging the power head by going cheap, in the long run a full kit replacement is insurance against potentially serious damage to the motor.

When you figure the cost of replacing a 20HP motor, the cost of a pump kit is a relative bargain!

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6/15/10 @ 7:03 PM
ml2trick
ml2trick
USER since 6/18/01
THAT WATER PUMP IS SHOT!!!!!!!!!,i have been a marine mech for a long time and if your housing is in good shape not melted or wore out inside with grooves then just pick up a water pump and install and you should be fine.OH AND ALWAYS INSTALL WATER PUMP CLOCKWISE LOOKING DOWN AT WATER PUMP IMPELLER.ALWAY'S!!!!!!!!!!! LIKE I TELL CUSTOMERS,RUN GOOD OIL, CHANGE YOUR LOWER UNIT GEAR LUBE IN FALL AND CHANGE YOUR WATER PUMP EVERY 2 TO 3 YEARS CONSIDERING WHAT CONDITIONS YOU USE THE MOTOR IN AND YOU SHOULD BE GOOD 2 GO.

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6/15/10 @ 12:35 AM
gmjammer
gmjammer
USER since 9/18/08
i know all motors are gonna be different prices but before you buy your impeller on ebay call your local merc dealer my '92 40horse only cost $10 brand new from the dealer. And i agree its junk while its out change it before you have to buy a new motor Puke.

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Displaying 1 to 10 of 21 Posts