PDA

View Full Version : Crank mount water pump failure?


JimG
10-03-2005, 11:28 AM
Anyone ever had the shaft pull out of the mounting plate? Mine failed on Saturday, just twisted itself right out of the plate.. :confused: Luckily I noticed the temps climbing and shut her down...
gcarter
10-03-2005, 02:07 PM
What brand of pump?
Which boat?
I'm running a Johnson.....I'm not sure I know how that could happen with it.
JimG
10-03-2005, 03:26 PM
It was a Johnson crank mount pump on my 1970 Donzi 351W. I don't know how it could happen either, usually those things are pressed on TIGHT! This one just spun right out...
gcarter
10-03-2005, 06:44 PM
I think I'd just snag a new one. Here in the Oelando area, they're about $130.00.
MOP
10-03-2005, 07:12 PM
Jim am I reading correctly the shaft came loose from the crank plate? I have only see that once, the V rep said it was mis alignement due to tension from the wire wound hoses the guy installed, we changed out the hoses with fabric reinforced.

Phil
Moody Blu'
10-03-2005, 07:51 PM
your running a johnson crank shaft pump on a 70? i have a 71 and i have a jabsco, did H/M change there motor mount pump setup in 71?
Jim what speeds are you seeing with your setup, your close to my set up.
GEOO
10-03-2005, 08:20 PM
Jim, I had the same experience. This spring my pump had a slight leak at the seal so to be safe I replaced the pump. Ran the boat once with the new pump and the shaft broke free from the mounting plate. I noticed it when I went to flush the engine I couldn't get water to go through the engine. I never over heated, was running fine, it must of happen when I started the engine to flush her. Was your's a new pump too?
JimG
10-03-2005, 08:48 PM
GEOO, it's about 2 years old. I'm glad to hear I'm not the only one.

Moody, my boat came with a pump marked Indmar. (Looks exactly the same as the Johnson) It leaked around the seals so I put the Johnson on. I think I paid around a hundred bucks for it. The model number is 24228-1, or F5B9.

I've seen 55mph at 5100 rpm with my 23" Ultra.

Thanks MOP, I'll check the hoses. My pump wobbled quite a bit, so maybe that contributed to it. I've built some bushings to better locate it on the crank next time so maybe that'll help...

Thanks guys!

JimG
mattyboy
10-03-2005, 09:04 PM
Not sure what type pump I have, it's mounted to a rectangular plate 4 long bolts and spacers one of which doubles as the upper alt. mount used jabsco impellor kit has a replacement, gasket, impellor and star shaped bushing for the connection to the motor
I have the replacement kit part number let me know if you need it
Moody Blu'
10-03-2005, 09:23 PM
Not sure what type pump I have, it's mounted to a rectangular plate 4 long bolts and spacers one of which doubles as the upper alt. mount used jabsco impellor kit has a replacement, gasket, impellor and star shaped bushing for the connection to the motor
I have the replacement kit part number let me know if you need it

i have the same style matty

the jabsco pump model# IS 11850-0711(clock wise rotation)
same pump as the 11850-0712 but the cam is on the other side(counter clock wise rotation).

heres a old thread too.

http://www.donzi.net/forums/showthread.php?t=1164&page=3&pp=15&highlight=jabsco+water+pump
MOP
10-03-2005, 09:47 PM
The pumps that Matty and Moody have sound like original HM they mounted the engine, pump and alterator all on a nice heavy piece, was a nice setup. The later pumps use the crank pulley bolts and have (or should have a stabilizer bracket), not a bad idea to also support the hoses so nothing wiggles around. The pump should look as if it is dead still when running. It is the easiest pump to service hands down.

Phil
JimG
11-15-2005, 02:24 PM
Installed new pump with some little aluminum bushings I made. No wiggle at all. Works like a champ...
MOP
11-15-2005, 02:50 PM
Good deal really nice to hear you report back that all is fine!

Phil
joem
11-18-2005, 03:49 PM
I have a 16 with the hm 302 also had a problem but not with the original jabsco pump...The three pertruding ears on the aluminum drive plate that bolts to the crank were wearing out because of the rubber spider gear deteriorating...This caused a metal to metal clicking sound Does any one know if this drive plate can be bought anyware ? I found the rubber spider gear in a pump shop...Tryed to buy the pump through jabsco they sold me a crank mounted pump that fell apart the same way your talking about....Mounting plate spun off...Like the original setup better it,s more solid joem
joem
11-18-2005, 04:06 PM
Not sure what type pump I have, it's mounted to a rectangular plate 4 long bolts and spacers one of which doubles as the upper alt. mount used jabsco impellor kit has a replacement, gasket, impellor and star shaped bushing for the connection to the motor
I have the replacement kit part number let me know if you need it
Hi matty would appreciate that kit # sounds like the same setup as mine 69 16 302 ford holman moody...thanks joem
mattyboy
11-19-2005, 12:05 AM
Joe ,
the kit number i have is only for the impellor, the rubber star bushing, and the paper gasket for the pump, I have them out in the garge I can post them up tom. am.
mattyboy
11-19-2005, 08:18 AM
jabsco impellor kit P/N 1210-0003

consists of

P/N

1673-0003
1673-9003
1673-1003
joem
11-20-2005, 02:28 PM
Anyone ever had the shaft pull out of the mounting plate? Mine failed on Saturday, just twisted itself right out of the plate.. :confused: Luckily I noticed the temps climbing and shut her down...
Is that ultra prop ss if so where did you find one for the 250 drive joem
JimG
11-20-2005, 06:48 PM
Got a 22" Ultra on ebay, then added an inch to it. Rpm's a little too high. Perfect now! Runs 54.7 at 5200rpm.