Hynautic H-21 Hydraulic Boat Helm Pump Rebuild Service

Hynautic H-21 Series Hydraulic Marine Boat Helm Pump (REBUILD SERVICE ONLY)

Background

• Over a period of time the seals in your H21 series Hynautic helm deteriorate and need to be replaced. We can rebuild your H 21 here at our facility serviced by our marine techs with 30+ years of experience.

Other Options

• We HIGHLY recommend rebuilding your helm. If your helm is not rebuildable, you can apply the $40 inspection fee to a new part below, no harm-no foul!
• You can purchase a NEW H-21 Here
• You can purchase the Dometic SeaStar Alternative Here

What Helm Pumps Do We Rebuild?

• H-21, H-21-1 & all variations of the H-21
• (Less Common) H-29, H-30, H-31 & their variations, you can use this page for these as well

How Much Does it Cost?

• Basic Rebuild, Seal Kit & Return Shipping - $350.00
• Replacement Parts if Needed:
  • New Shaft - Fluctuates
  • New Front Plate - Fluctuates

How Long Does it Take?

• See above for the most up to date estimated rebuild time

RUSH YOUR REBUILD

• Option Above ($175): Once we receive your part, we’ll rebuild and ship it the same day. If it arrives in the afternoon, we’ll complete the rebuild and ship it the next business day. Please note, if the part is not rebuildable or requires repairs beyond a standard rebuild, additional time may be needed-we’ll contact you in that case. For faster return shipping, you can choose an expedited option at checkout.

How to Remove your Helm

• 2 Line Systems:
1. Remove Wheel and steering lines from helm (Cap steering lines and mark Port and Starboard)
2. Remove ALL fittings from your helm, $30 fee otherwise
3. Drain ALL oil from part, $30 fee otherwise
• 3 Line System
• Same Steps as 2 line systems but you will need to relieve pressure from the steering pressure reservoir until the gauge reads 0. Proceed with steps 1 - 5 for 2 line system
• Notes: Do not use a hammer on the steering shaft as it will damage the threads. Do not use vise grips on the shaft

How to Ship your Part

1. Describe the Issues You Are Experiencing in the text field above, this is required, and will be the way we address your concerns.
2. Add this service to your cart
3. Checkout
4. Include a note with:
   1. Your return address
   2. Your phone number, email and order number
5. If you chose the RUSH option, write "RUSH" on the outside of your box
6. Ship your part to us with FedEx, UPS or USPS
7. Once we receive your part, we will inspect it, service it, and send it back

2nd Option

• Include a note in the box with your return address, contact information, the issues you are experiencing, ship the part to us, no need to checkout online.
• Please note, we can track your rebuild better if you place the order online, you acknowledge this when not placing the order online. 

Send Your Part to The Following Address:

Seatech Marine Products
Attn: Service Dept.
2805 Canon St STE 101
San Diego CA 92106

Downloads & Resources 

• Hynautic Three Line Bleeding Instructions [PDF]

About our Rebuild Service:

Seatech Marine Products, located in San Diego, CA has over 30+ years in the marine service business. We are an authorized dealer for Dometic SeaStar, and Hynautic. We are well versed of the ins and outs of your helm. Once you send your helm into us for rebuild, a marine tech will look over your part and make sure it only needs to be rebuilt, if we encounter more issues we will contact you for approval of repair and for your payment information. Although your helm is expected to last years, we offer a 6 month limited warranty from the date of delivery back to you.

Terms of Purchase:

• If the part is not rebuildable, inspection fee is $40 + return shipping if you wish to keep it. The inspection fee can be applied to a new part
• Drain ALL oil from helm. If we have to drain the oil for you, there is a $30 fee for us to recycle it
• Remove ALL the fittings from your helm. If we have to remove fittings for you, there is a $30 fee for us to do so
• Estimated rebuild time is ONLY AN ESTIMATE, and is based off of when we receive your part, how many rebuilds we have going on at the moment, and how much attention your part will need. In no way is the ESTIMATED rebuild time a guarantee. If you need the part rebuild immediately (1 full day of having it) choose the RUSH option

Questions?

• Tech Support: Tech Support Page
• Check Stock: Stock Inquiry Page
• Request a Shipping Quote: Request Quote Page

• No Sales Tax on Purchases Outside of California
• Buy Now Pay Later with Affirm or PayPal Pay Later
• FREE Ground Return Shipping to the Contiguous 48 States
• Seatech Marine Products, Inc. is an authorized dealer, and service center for Dometic Marine & Hynautic 

International, USVI, Puerto Rican, Hawaiian & Alaskan Customers: We Ship Worldwide and USPS, shipping cost may quote too high on our website, EMAIL US for a shipping quote.