Reoccurung water pump failures...
#1
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Thread Starter
Reoccurung water pump failures...
Hi folks.
My 1995 Formula 271 has a 502efi and Bravo 3.
This boat is in good shape and lives on a trailer when not in use.
I posted a while back regarding ongoing sea water pump impeller failures.
This boat has a seawater/fuel pump combo.
The consensus at the time was that the internal hose in the drive may have a restriction or be weak and collapsing from time to time and I was using the wrong muffs
I had been going thru 3-4 impellers per season., the boat being used 8-10 occasions per season.
There is no pattern for failure. Sometimes it failed running on the hose in my prelaunch start up/check over.
Sometimes it fails at initial start up in the water, after being just run ok on the hose.
I use the Mercruiser muffs that have the pin and locking tab to keep them tight on the drive.
http://www.ebay.ca/itm/Genuine-Mercu...733?rmvSB=true
The boat now has a brand new B3 drive and is still eating impellers.
I also ensure that the drive is lowered on the muffs so there is no chance for hose restriction.
Any ideas..........
My 1995 Formula 271 has a 502efi and Bravo 3.
This boat is in good shape and lives on a trailer when not in use.
I posted a while back regarding ongoing sea water pump impeller failures.
This boat has a seawater/fuel pump combo.
The consensus at the time was that the internal hose in the drive may have a restriction or be weak and collapsing from time to time and I was using the wrong muffs
I had been going thru 3-4 impellers per season., the boat being used 8-10 occasions per season.
There is no pattern for failure. Sometimes it failed running on the hose in my prelaunch start up/check over.
Sometimes it fails at initial start up in the water, after being just run ok on the hose.
I use the Mercruiser muffs that have the pin and locking tab to keep them tight on the drive.
http://www.ebay.ca/itm/Genuine-Mercu...733?rmvSB=true
The boat now has a brand new B3 drive and is still eating impellers.
I also ensure that the drive is lowered on the muffs so there is no chance for hose restriction.
Any ideas..........
Last edited by nsformula; 08-22-2016 at 06:06 PM.
#3
Registered
Thread Starter
Do you mean the internal hose in the drive.
The drive is brand, not rebuilt, I can`t imagine that hose being my current issue.
#4
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iTrader: (3)
No, the hose from the back of the water pump housing to where it connects at behind the motor. Also, see if the neck it attaches to is cracked and you're sucking air in.
The line you need is 1 1/4" dia wire reinforced hose
The line you need is 1 1/4" dia wire reinforced hose
#5
Registered
Thread Starter
Generic hose ok, or Merc hose required.
#7
If you did not replace the Transom Assembly then you did not replace the hose in question.
The hose in Transom Assy. is P/N 32-8M0090859
The hose in Transom Assy. is P/N 32-8M0090859
Last edited by GLENAMY 242SS; 08-23-2016 at 09:55 AM. Reason: added part #
#8
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Thread Starter
As I said, the drive is new, as well as the transom.
Can`t imagine that hose being the issue at this point, but I can check it.
#9
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Thread Starter
Coupler, steering ram, transom, gimbal, drive, props etc, All new Merc gear.
The hose from the transom to the water pump housing is likely the original, could be part of the problem
Last edited by nsformula; 08-23-2016 at 10:14 AM.
#10
Platinum Member
Platinum Member
iTrader: (6)
Yes, replace the hose from the inner transom assembly to the sea pump, they can collapse internally just like a radiator hose
Edit: make sure you don't have them reversed.
Edit: make sure you don't have them reversed.