


Shaft Mount Gear Speed Reducer 25:1 Size 4 | SMR425
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
Shaft Mount Gear Speed Reducer 25:1 Size 4 | SMR425Dimensions PDF Product Details : Shaft Mount Gear Speed Reducer 25: 1 Size 4 SMR425 Part No: SMR425 Product Category: Shaft Mount Series: SMR Type: Gear Speed Reducer Size: 4 # of Outputs: 1 Ratio: 25: 1 L (IN): 10. 39" U (IN): 1. 34" V (IN): 4. 03" T (IN): 4" A1 (IN): 2. 76" A2 (IN): 5. 53" A3 (IN): 4. 76" Output Bore Max. (B Max.): 2. 438" C (IN): 1. 75" E (IN): 4. 81" Input Shaft (F): 1. 438" Key (IN): 3 8"x3 16"x4" G (IN): 3. 26" H (IN): 6. 38" M
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4.1 ★★★★★
Based on 642 reviews
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Product Reviews
★★★★★ 5
Good quality though
Size: 2AWG 15FT + 15FT, Color: Red + Black
Good though quality
Thick
Works good
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 15, 2025
★★★★★ 5
Durable Solenoid for Starter and Trim
Number of Items: 1
Installed easily and works perfectly. Engages the trim and starter reliably every time. Solid, durable, and great value.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 9, 2025
★★★★★ 5
Works Great
Number of Items: 1
I have a 1988 mercury/mariner 75 hp motor. My motor would not go down. Purchased this solenoid to replace the old one. Fit perfect and fixed my problem
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 30, 2025
★★★★★ 5
Just the part I needed
Number of Items: 1
It was a perfect match to the one I needed to replace. And the shipping was lightning fast
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 7, 2026
★★★★★ 5
Works great
Number of Items: 1
Works great easy fix for my Merc. Trim motor
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Reviewed in the United States on September 3, 2025
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