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Old 01-23-2013, 07:57 PM   #21
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City: Auckland
Country: New Zealand
Vessel Name: Pioneer
Vessel Model: Westcoaster 53 converted to pleasure
Join Date: Nov 2007
Posts: 283
I use a Jabsco puller but have to take the pump off before I can remove front cover. There just isn't enough space between the front/top of engine where the pump is mounted and a deck bearer. Speedseal would work OK but they don't make one for the Cat 3406.
The previous owner (fisherman) never changed the impeller in ten years. I changed it 6 years ago and the old one looked as good as the new one so I've kept it as a spare. I do check every two years - which means removing the hoses and the pump - a job that takes at least an hour to do.
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Old 01-23-2013, 08:08 PM   #22
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City: Kent Island
Country: USA
Vessel Name: Sundowner
Vessel Model: Gulfstar 36 MrkII
Join Date: Jul 2012
Posts: 226
My Onan uses the Oberdorfer pump and they don't make a cover for it. My pump was an example of neglect and I just replaced the whole thing for $225 boat credits. On the new pump you can reverse the cover and it has hex head bolts instead of screws. in the photo you can see how bad this original 1984 cover had gotten over the years.


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Originally Posted by RT Firefly View Post
Greetings,
One of these years I'm going to order two (possibly another set for the Onan if available) sets of these. The "Easy Slider" covers, that is...Anybody use 'em?
Welcome to Speedseal
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Old 01-23-2013, 08:36 PM   #23
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Quote:
Originally Posted by RT Firefly View Post
Greetings,
One of these years I'm going to order two (possibly another set for the Onan if available) sets of these. The "Easy Slider" covers, that is...Anybody use 'em?
Welcome to Speedseal
A number of people on the GB forum have installed them on their FL120 stock raw water pumps. Everyone who's posted about them is very happy with them. I don't know if they are available for the new Johnson pump that replaces the stock Jabsco pump.
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Old 01-23-2013, 08:45 PM   #24
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Psneeld makes a good point about impellers taking a set. We have two pieces of equipment on our boat that use flexible impeller pumps but don't get a lot of use. One is our Onan Jurrasic Model MDJE generator and the other is a huge (for our kind of boat) Westinghouse AC salt water washdown pump.

On the advice of a friend who's a retired marine engineer we run the AC pump every time we're at the boat for a few seconds. The killer of flexible impellers is heat, not running them dry. Of course if you run them dry it will build up heat extremely fast and damage will occur. But running the pump for two seconds or so hurts nothing. However it not only puts the impeller in a different position but it spins the pump shaft in its seals and so keeps the shaft and seal surfaces smooth and in good condition.

On the advice of our local Onan dealer we bump the starter on the Onan when we're at the boat even if we're not taking it out or using the generator. This keeps the starter solenoid limber, turns the starter motor a wee bit, and moves the raw water pump impeller enough to put it in a different position. Just a bump. Not a turn-the-engine-over thing.
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