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Jan 23rd, 2013
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Question about a Yamaha SHO #14473155 09/10/22 01:50 AM
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Dad2rlkm Offline OP
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I have a 2023 Yamaha SHO 250 and I am concerned the lack of stream pressure on the "overboard discharge" from the water pump. I have probably less than 6 hrs on the motor so far. When I am idling the stream pressure is close to average but not what I would expect. When am doing the break-in in the different RPM zones, the stream pressure drops off badly. An extremely weak stream. Like it has a bad prostrate.
My question to you SHO owners: is the water pump output variable? Does yours do this? I am afraid I picked up some form of trash in the intake and it isn't flowing the way it should.

Last edited by Dad2rlkm; 09/10/22 01:54 AM.
Re: Question about a Yamaha SHO [Re: Dad2rlkm] #14473163 09/10/22 01:59 AM
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tmd11111 Online Content
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Mines a ‘17 model and it does the same. At idle it’s only about 2psi and wot it’s about 11-12

Re: Question about a Yamaha SHO [Re: tmd11111] #14473184 09/10/22 02:33 AM
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Dad2rlkm Offline OP
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I think mine is doing the opposite. Almost good pressure at idle and next to none at higher RPMs.

Re: Question about a Yamaha SHO [Re: tmd11111] #14473217 09/10/22 03:15 AM
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Duke 22 Online Content
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Originally Posted by tmd11111
Mines a ‘17 model and it does the same. At idle it’s only about 2psi and wot it’s about 11-12

My 2019 250 is about the same.

Re: Question about a Yamaha SHO [Re: Duke 22] #14473402 09/10/22 02:24 PM
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forkduc Offline
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So is my 2014!

Re: Question about a Yamaha SHO [Re: forkduc] #14473508 09/10/22 03:51 PM
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Dad2rlkm Offline OP
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To be sure I understand what ya'll are saying, is your stream stronger at idle,or stronger at WOT?

Mine is stronger at idle almost nothing at higher RPMs.

Re: Question about a Yamaha SHO [Re: Dad2rlkm] #14473620 09/10/22 05:52 PM
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Originally Posted by Dad2rlkm
To be sure I understand what ya'll are saying, is your stream stronger at idle,or stronger at WOT?

Mine is stronger at idle almost nothing at higher RPMs.

WOT

Re: Question about a Yamaha SHO [Re: Dad2rlkm] #14475269 09/12/22 01:05 PM
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poker1980 Offline
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12 psi is all that is required for SHO's

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