RWP Flow Direction
Printed From: CorrectCraftFan.com
Category: Repairs and Maintenance
Forum Name: Boat Maintenance
Forum Discription: Discuss maintenance of your Correct Craft
URL: http://www.CorrectCraftFan.com/forum/forum_posts.asp?TID=10162
Printed Date: November-17-2024 at 12:59am
Topic: RWP Flow Direction
Posted By: mndanielsncsu
Subject: RWP Flow Direction
Date Posted: April-16-2008 at 2:31am
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I made a rookie mistake today by not marking the flow direction on my raw water pump before removing it to replace the impeller. I have a 93 Sport Nautique with the PCM Pro-Boss GT-40. The pump is a Sherwood brand. There is a screw on one side of the pump, can some verify if it should face the engine or face away? I'm assuming this is the best way to determine if the pump is installed in the right direction. If there's an easier way to do this without cranking the motor, let me know.
Also, which direction does this motor turn (LH or RH)? It's a direct drive. |
Replies:
Posted By: jdkenyon
Date Posted: April-16-2008 at 1:58pm
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I believe the screw should face the motor but I don't have my manual handy to verify that.
Your motor should be LH rotation. ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=1955 - 94 Ski Nautique |
Posted By: phospher
Date Posted: April-16-2008 at 2:09pm
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I have an 82' 351W and I have an newer sherwood pump too. The flat head screw faces away from the motor on my boat. ------------- |
Posted By: TRBenj
Date Posted: April-16-2008 at 2:27pm
Phospher, do you have a RH or LH motor? JD is right about the '93 Proboss being LH. Id tell you which way the cam in the pump is supposed to face, but I dont remember. I mark my pump so I dont put it on backwards. ------------- |
phospher wrote:Posted By: phospher
Date Posted: April-16-2008 at 2:31pm
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maybe you can tell me(cause i'm not sure)? my prop is a LH prop. ------------- |
Posted By: tullfooter
Date Posted: April-16-2008 at 2:35pm
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Oh No!
Haven't heard this discussion before.  ------------- Play hard, life's not a trial run. '85 BFN '90 BFN White Lake, Michigan |
Posted By: TRBenj
Date Posted: April-16-2008 at 2:51pm
All 1:1 trannies spin the same direction as the engine- so LH motors spin LH props. Only the 1.23 guys get LH motors that mate to RH props. From the pictures I have, I believe the screw faces in on the LH motors, and out on the RH. Can anyone else confirm? ------------- |
Posted By: jdkenyon
Date Posted: April-16-2008 at 3:21pm
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I dug through my stuff and found the installation instructions for the Impeller. It says on the RH engines the screw faces out (away from the engine) on the LH it faces in. So on mndanielsncsu's boat it should be toward the motor. ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=1955 - 94 Ski Nautique |
Posted By: phospher
Date Posted: April-16-2008 at 4:04pm
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hmm, i must have been mistaken then. i'll have to take another look when i get home. i could have sworn that the screw faced out on my left hand engine. ------------- |
Posted By: phospher
Date Posted: April-16-2008 at 4:16pm
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ahh, my bad. i was thinking what side the screw was on, not what side the screw was facing. ------------- |
Posted By: TRBenj
Date Posted: April-16-2008 at 4:50pm
I think youre still confused. Alan's RH engine (screw is out): 
My LH engine (screw is in):  ------------- |
Posted By: mndanielsncsu
Date Posted: April-16-2008 at 4:52pm
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Alright, so just to confirm... the screw head should be on the motor side of the pump and it's a LH turn motor if looking from rear of the motor forward, right?
Thanks for all of the responses. -Matt |
Posted By: phospher
Date Posted: April-16-2008 at 4:54pm
that is a nice looking engine. i need to get me one of those how much??
my water pump is on the other side of the engine. ------------- |
Posted By: TRBenj
Date Posted: April-16-2008 at 4:58pm
Phospher, youre mucking up this discussion and you dont even have a PCM??? 
Matt, youve got it correct. You have a LH engine- which means it will turn counterclockwise when viewed from the rear. Your pullies will spin clockwise when viewed from the front. The screw head will be on the motor side, just like my '90. Note the arrow that I drew on my pump. After a long winter, it reminds me which side goes up AND which way it spins. You may want to add something similar. ------------- |
Posted By: phospher
Date Posted: April-16-2008 at 5:01pm
sorry, my bad.  ------------- |
Posted By: mndanielsncsu
Date Posted: April-16-2008 at 6:09pm
| Not a bad call TRBenj, I think I'll do that tonight actually. Thanks for the great info... I was stressing about putting the pump on backwards. |
Posted By: saffer
Date Posted: July-18-2008 at 11:56pm
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there are no trout where i live!!
and the impeller, no problem which way the fins go when installed as they will "auto correct"? |
Posted By: 8122pbrainard
Date Posted: July-19-2008 at 10:53am
I think Eric was referring to a different species of trout!! Yes, the impeller blades will correct themselves but It's better to install them in the proper direction first instead of forcing them backwards over themselves. It is a severe flexing of the rubber. ------------- /diaries/details.asp?ID=1622" rel="nofollow - 54 Atom /diaries/details.asp?ID=2179" rel="nofollow - 77 Tique 64 X55 Dunphy Keep it original, Pete < |