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38mm x 4mm Pin Wrench (AMT0304) - Replaces AMT0004

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SKU
AMT0304
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38mm x 4mm Pin Wrench (AMT0304) - Replaces AMT0004 28 5 5 1
$61.75

Professional 38mm pin wrench for dual-purpose applications. The 300-Series AMT0304 removes seized Yamaha V6 tilt caps and Seastar steering glands without damaging the aluminum housing.

  • ✓ OEM Crossover: Direct alternative for factory tools used on Yamaha V6 tilt caps (YB-06548) and Seastar HS5157 steering cylinder rebuilds.
  • ✓ Guaranteed Fit: Use our Product Selection Tool to confirm fitment for your specific application.
  • ✓ Anti-Slip Integration: Locks into the AMT0170 Protective Sleeve, using the outboard's weight to prevent tool "kick out."
  • ✓ Lifetime Warranty: Rated for 200+ ft-lb of torque and crafted from polished stainless steel.

Professional Grade. Patented Design. Ships same day.

Is this the right wrench for your outboard?

Trim and tilt caps vary greatly by engine year, make, and model. Take the guesswork out of your repair and guarantee a perfect fit before you buy.

Use Our Trim & Tilt Wrench Selection Tool

Technical Specifications & Fitment

Feature Details
OEM Factory Crossover Equivalent to Yamaha YB-06548 and factory Seastar steering gland tools
Pin Stance & Size 38mm x 4mm
Primary Applications Seastar HS5157 Rebuilds & Yamaha V6 (4-Stroke) Center Tilt Caps
Torque Rating 200+ ft-lb Minimum Yield
Drive Size Standard 1/2 Inch Socket Drive
Material & Warranty Polished Marine-Grade Stainless Steel (Lifetime Warranty)
Replacement Pins L-4 Pins (SKU: AMT0050)

Marine Tech 300-Series Pin Wrench (38mm)

The AMT0304 is designed to safely remove and install seized Yamaha V6 center tilt caps and Seastar steering gland nuts without damaging the aluminum housing. As part of our upgraded 300-Series, this tool is crafted from polished marine-grade stainless steel, handles over 200 ft-lbs of torque, and is backed by a Lifetime Warranty. To prevent tool slip—which can strip pin holes and damage cylinders—this wrench features a hex-body design that locks perfectly into the AMT0170 Protective Sleeve (Sold Separately). By resting the outboard directly onto this sleeve, the engine's weight securely traps the wrench against the cap, ensuring safe and precise removal under heavy breaker-bar pressure.

More Information
Pin Circle Diameter38mm
Pin Diameter4mm

Customer Reviews

5
5 out of 5 stars
100%
28 Reviews
96% of customers
recommend this product
5 stars 27 (100%)
4 stars 0 (0%)
3 stars 0 (0%)
2 stars 0 (0%)
1 star 0 (0%)
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Newest
Helpfulness
Great tool!
5
Sep 20, 2025
Tool was very useful removing the seal caps on my 2015 Yamaha 250 SHO. First time they were removed in 10 years with no issues. I mostly run freshwater in south Louisiana, but I always flush and rinse the motor when I run in saltwater.
Was this review helpful? 33
This tool made changing the ...
5
Jun 23, 2025
This tool made changing the seals on my trim shafts incredibly easy!! It took the cups off the tops of the cylinders with ease. I was able to do all 4 of them on my F250's in about an hour.
Was this review helpful? 0
Best quality.
5
May 13, 2025
Best quality. Do not use the two pin simple wrench that is with some kits. Buy this one and do the job right with a quality torque wrench when tightening up.
Was this review helpful? 0
Good quality product.
5
Apr 6, 2025
Good quality product. Fit the Seastar fittings perfectly.
Was this review helpful? 0
Verified Buyer
Looks Tough. Merry Christmas!!
5
Dec 23, 2024
Delivered on time, even got a Cuzi with it!! I have not used it yet, but being an Engineer, I can see that the quality is top notch.
Was this review helpful? 3
Verified Buyer
Best tool for the job
5
Nov 8, 2024
Best tool for the job, perfect fit for a DIY fix. I'm ecstatic that I have made this purchase and it saved my trim caps for re-use after replacing the seals.
Was this review helpful? 2
very happy
5
Jul 1, 2024
top quality
Was this review helpful? 2
Verified Buyer
very happy
5
Jul 1, 2024
top quality
Was this review helpful? 3
Verified Buyer
Great Company, people, parts, and tools
5
May 31, 2024
The Marine Tech people were awesome. I ordered an spanner wrench and seal kit over paid. They called me to tell me this and used the over pay to send my kit overnight. I run a charted business and time is critical, so their thoughtfulness and discipline to go above and beyond was literally a time saver. I highly recommend using Marine Tech. Good quality parts and tools, made this whole process a breeze.
Was this review helpful? 2
Verified Buyer
perfect part. quick shipping
5
Apr 4, 2023
exact fit. makes the repair work so much easier and it arrived quickly
Was this review helpful? 4
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