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Odo

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Posts: 86
Reply with quote  #1 
I have 2018 twin 300 hp G2s on a 2007 28' Bluewater.  I have had some power steering issues over the past couple of years.  The helm is original so it's 13 years old.  I noticed some minor leaks on the body of the helm where it is sandwiched together.  I am considering replacing the helm vs rebuilding to ensure there are no leaks going forward.  My thought is that leaks in the steering system (even minor ones) eventually lead to air in the system and caused the DPS pressure sensors to malfunction.  Can anyone validate that?  Regardless, I want to kill this steering problem once and for all!

The existing helm is a UFLEX UP33T (tilt) which originally was used with G1 300 Etecs with twin hydraulic cylinders.  I want to use the same style helm so I don't need to modify the dash, etc.  My question is do I need to go with the same size helm or would a smaller one be adequate?  The UFLEX specs are as follows:
 
uflex helm.png
If that is unreadable, my helm existing has 2.0 cu. in. but there are also helms  with 1.7 and 1.5 displacement.

I have read on this site that a G2 has 8.9 cu. in. displacement (someone please validate this).  The way I understand it, 8.9/2.0=4.45 turns lock to lock. The next smaller helm is 8.9/1.7=5.23.  The smallest helm is 8.9/1.5=5.93.  Replacing the helm with the same size that I have now would be most responsive but higher effort to turn.  UFLEX recommends between 4 and 8 turns, lock to lock.  I also have an autopilot and don't know how that might enter into the equation.  Which helm is preferred for my application? 



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Bluewater 2850 Twin 300 G2s
Model E300XUAGF / H300XCUAHA
S/N 05503190 / 05526386

mead

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Posts: 771
Reply with quote  #2 
The helm as you have highlighted is adequate as the 2.0 displacement. With DPS you will not feel the steering effort. 4 turns lock to lock will provide good response when steering.
the auto pilot is a separate pump so the helm you select will not play a part in that system. 
Odo

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Posts: 86
Reply with quote  #3 
Thank you for the reply.  I also spoke to UFLEX tech support.  I couldn't get the 2.0 displacement helm quickly enough so I went with the 1.7 helm. That helm should work fine and if the DPS ever fails again it may be slightly easier to turn without the aid of the DPS.  The boat is in the shop and I wanted them to replace the helm while it was all torn apart because it did have some minor leaks. 

No one has answered my question regarding the failure mode of the pressure sensors.  Could it be that air in the system caused the pressor sensor(s) to malfunction?  The DPS has a bad reputation as being failure prone.  I am wondering if my two failures aren't actually failures of the components, but instead are due to air in the system.  Mechanics don't necessarily get paid to troubleshoot warranty work, they fix the problem as quickly as possible.  Just a thought...

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Bluewater 2850 Twin 300 G2s
Model E300XUAGF / H300XCUAHA
S/N 05503190 / 05526386

olypopper

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Posts: 7,462
Reply with quote  #4 
My opinion is the pressure sensors are simply failing due to poor quality.  
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"Never believe what you read on the internet"-Abraham Lincoln
ELGIN

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Posts: 50
Reply with quote  #5 
I second that opinion, the sensors were upgraded to a better quality part from the original.
ajtec

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Posts: 139
Reply with quote  #6 
I was seconding that opinion but now I guess I will be the third.
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