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Old 02-09-2011, 07:40 AM   #21
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RE: Lehman 120 Raw water pump

"A shop commanding this much coin for a rebuilding should have known the apparent weakness in the original pump drive, and at least advised the boat owner of the potential problem."

I don't agree that they should have known. Not unless they participate in some of these boating forums, or have an MTOA membership, etc.
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Old 02-10-2011, 02:26 PM   #22
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Lehman 120 Raw water pump

Quote:
JohnP wrote:

A shop commanding this much coin for a rebuilding should have known the apparent weakness in the original pump drive, and at least advised the boat owner of the potential problem.
*

That will depend on the shop and if they have encountered any problems with the Lehman pump drive in the past.* The shop we use has, and so knew all about the Johnson pump and recommended it the moment they saw our drive was failing.* Other shops, even shops with Lehman experience, may not be aware of the problem.* We'd never heard of it even after years on the GB forum until the shop found the problem.* We knew about the option of using the Johnson pump from the GB forum, but we'd never heard about the potential failure of the Lehman drive.


-- Edited by Marin on Thursday 10th of February 2011 03:26:53 PM
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Old 03-16-2011, 04:49 PM   #23
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RE: Lehman 120 Raw water pump

How difficult is it to change out the raw water pump to the Johnson pump?* My starboard engine has the Johnson pump, but I am going to replace the port Jabsco with a new Johnson.

Thanks for your wisdom!
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Old 03-16-2011, 06:05 PM   #24
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RE: Lehman 120 Raw water pump

Wannabe.* The port engine has the raw water pump toward the center of the boat I believe.

This should be very accessable.

It is pretty easy to change.

Shut the seacock.
Remove the hoses.
Remove 4 bolts and pull off the Jabco pump.
Remove the 3 bolts holding the original pump drive.
Pull the drive out of the front housing, it will have a gear on it.

Install the new Johnson pump with the 3 bolts that held the drive on.
The Johnson should have a new gear on it.
Reconnect the hoses--you may need new longer ones.
Open seacock and go.

Call Bob Smith at American Diesel to get his advice on this.

Save your old drive unit for the Jabsco--Someone on this forum needs it, if it is not broke.* It is a great spare for those with the original setup.

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Old 03-17-2011, 06:53 AM   #25
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RE: Lehman 120 Raw water pump

"with a new Johnson"

Make it the Big Johnson** ...no really there is one with larger ports.

There is also a tapered pin that you have to put into the oil feed hole for the gear if I remember correctly. That was in the instructions that come with the kit.

I sold my old original pump. It went quickly. At least I was able to recoup a few dollars.
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Old 03-17-2011, 07:14 AM   #26
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RE: Lehman 120 Raw water pump

Our original pump failed in 2006 and at the time Atlantic Yacht Basin in Great Bridge, VA replaced it with a new Jabsco. They see lots and lots of these engines and are a very reputable yard yet they didn't know about the design flaw in the adapter. Well of course late in the afternoon in 2009 at the start of a night crossing of the Chesapeake the adapter failed and I had to replace the whole thing while being towed. By incredible luck the tow operator was coming out of Reidville and I got Brian at American Diesel to leave a pump outside so the tow guy could pick it up and bring it to me when he came to tow me. I was able to restart and release the tow but the experience was $600 of waste. I don't really blame AYB for not knowing #%&$ happens.
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Old 03-17-2011, 07:18 AM   #27
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RE: Lehman 120 Raw water pump

Quote:
Wannabe wrote:

*

How difficult is it to change out the raw water pump to the Johnson pump?* My starboard engine has the Johnson pump, but I am going to replace the port Jabsco with a new Johnson.

Thanks for your wisdom!

*
Easy enough that I did it while being towed in a steady chop. Took less then two hours start to finish.

*
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Old 03-17-2011, 07:21 AM   #28
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RE: Lehman 120 Raw water pump

Quote:
shrimp wrote:This is the second Lehman we have had rebuilt under insurance
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Why did insurance pay for two re-builds?
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Old 03-24-2011, 06:52 AM   #29
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RE: Lehman 120 Raw water pump

Well, the first time the boat was slipped stern first up a fairly steep slipway,as it turned out the sea water in the exhaust box drained past the riser into the top of the engine cylinders.Other work was being done to the boat so it was about a month before they tried to start the boat, by then the damage was terminal. The second event is still somewhat of a mystery to us, the engine cooked during a short trip , no more than 30 minutes. When my partner heard the engine buzzer sound he shut down the engine, but it appears the damage had been done, one cooked engine.The insurance company was pretty good about it, considering two engines in four years cost them over $50K. Back to the Raw Water Pumps thread....At the moment I am looking at the invoice for the repair of my two raw water pumps on the Lehmans, that were done during the boat's service last week.One pump was leaking a bit and needed looking at, the other I had done on the 'better safe than sorry principle'.I am a bit stunned that the service for the 2 pumps was over $1,400, which does not include removal or refit.I hesitate to ask, does this seem somewhat over the top?
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Old 03-24-2011, 07:04 AM   #30
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RE: Lehman 120 Raw water pump

Quote:
Shrimp wrote:

*

*

*

*

'I am a bit stunned that the service for the 2 pumps was over $1,400, which does not include removal or refit.
*********If by service, you mean rebuild I think you could have bought 2 new Jabscos for that amount. Quick searching online shows pricing as low as 500. each.**Parts and service seem a lot more expensive over there, than in the U.S.

I guess shipping is a big factor.* How much is diesel fuel in your neck of the woods?** JohnP

*
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Old 03-24-2011, 04:37 PM   #31
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RE: Lehman 120 Raw water pump

Well it's about $1.40 a litre, which is about $5.60 a US gallon, approx.
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Old 03-26-2011, 05:34 PM   #32
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RE: Lehman 120 Raw water pump

John P and Daddyo,

You were right.* There was not much to installing the new water pump.* The only complication was rerouting the raw water supply line just a bit, requiring a new threaded fitting with a barb.

Pictures below...

1. Old pump

2. Wear on the shaft of the pump

3. Pump removed

4. New pump

5. New pump installed

*

Thanks for the encouragement!
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Old 03-28-2011, 06:13 AM   #33
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RE: Lehman 120 Raw water pump

Good Job,* How much was the new Pump$.* If you still have the original drive, you can list it in the classified section.* Someone might want it as a spare.*Folks still with the Jabsco can lose cooling at any time if the drive fails. A spare drive can get a single engine boater back to their homeport for repairs.

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Old 03-28-2011, 10:28 PM   #34
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RE: Lehman 120 Raw water pump

Good job Wannabe!
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Old 03-29-2011, 03:56 PM   #35
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RE: Lehman 120 Raw water pump

JohnP,

The total cost was about $500.* Pump supplied by American Deisel along with some great guidance.* They are the best!

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Old 03-29-2011, 03:59 PM   #36
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RE: Lehman 120 Raw water pump

Quote:
Wannabe wrote:
JohnP,

The total cost was about $500.* Pump supplied by American Deisel along with some great guidance.* They are the best!

Wannabe
********* Wannabe,* Thats not bad, Your right about Amerian Diesel.* JohnP

*
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Old 04-07-2011, 06:03 AM   #37
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RE: Lehman 120 Raw water pump

Wannabe

Looking at your photos of the new pump installed -

One thing I dont care for is a hose connection in which the hose HANGS from the hose barb fitting. Rather, I like to see an 90 deg elbow then the hose barb so the hose comes on horizontally instead of vertically.

In this way, the hose is not pulling itself off by gravity.

*

I know its a nit pick. But if your clamps ever get loose, the vertical installation has a higher possibility of catostrophic failure than a loose clamp on an elbow installation.

R.
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Old 04-07-2011, 06:43 AM   #38
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RE: Lehman 120 Raw water pump

Don't agree about adding another 90degree elbow into the system.

But,* I probably would have painted the whole thing red before installing.

Nit pick 2************ JohnP
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Old 04-07-2011, 08:18 PM   #39
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RE: Lehman 120 Raw water pump

Nice job with the replacement.* I had the same problem, and also replaced with the new unit, as supplied by American Diesel.* Easy install.* And.....I've yet to paint mine red.
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