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Mercury
 Long Shaft Extension Kits
 Bay has expanded its line of kits to convert  Mercury outboards to long or extra long shaft.  Even though they cost a fraction of factory parts alone to convert standard motors to long shaft,  Bay extension kits are designed and manufactured of top quality materials to give lasting reliability to your outboard motor. 

Using compatible alloys in both the housings, shafts, and studs, these kits are as corrosion resistant as the motor itself. All shaft and studs are of stainless steel and housings are cast of the same type of alloy as used in the motors. 

Dealer pricing is available pending proper qualifications. 


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Extension Kits for Mercury Models 100 4 cyl. Serial Number: D283222 and up
Extension Kits for Mercury Models 100 4 cyl. Serial Number: D283222 and up
Using compatible alloys in both the housings, shafts, and studs, these kits are as corrosion resistant as the motor itself. All shaft and studs are of stainless steel and housings are cast of the same type of alloy as used in the motors. Extension Kits for Mercury Models 100 4 cyl. Serial Number: D283222 and up - 5 Inches
 
Base SKU:MCER-100414
In Stock:Yes
Price: $560.00 
 
Quantity:   

Extension Kits for Mercury Models 100 4 stroke Driveshaft not available for some models.
Extension Kits for Mercury Models 100 4 stroke Driveshaft not available for some models.
Using compatible alloys in both the housings, shafts, and studs, these kits are as corrosion resistant as the motor itself. All shaft and studs are of stainless steel and housings are cast of the same type of alloy as used in the motors. Extension Kits for Mercury Models 100 4 stroke Driveshaft not available for some models. - 5 Inches
 
Base SKU:ME-100414S
In Stock:Yes
Price: $460.00 
 
Quantity:   

Extension Kits for Mercury Models 115 4 cyl. Serial Number: D283222 and up
Extension Kits for Mercury Models 115 4 cyl. Serial Number: D283222 and up
Using compatible alloys in both the housings, shafts, and studs, these kits are as corrosion resistant as the motor itself. All shaft and studs are of stainless steel and housings are cast of the same type of alloy as used in the motors. Extension Kits for Mercury Models 115 4 cyl. Serial Number: D283222 and up - 5 Inches
 
Base SKU:M1100414
In Stock:Yes
Price: $560.00 
 
Quantity:   

Extension Kits for Mercury Models 115 4 stroke Driveshaft not available for some models.
Extension Kits for Mercury Models 115 4 stroke Driveshaft not available for some models.
Using compatible alloys in both the housings, shafts, and studs, these kits are as corrosion resistant as the motor itself. All shaft and studs are of stainless steel and housings are cast of the same type of alloy as used in the motors. Extension Kits for Mercury Models 115 4 stroke Driveshaft not available for some models. - 5 Inches
 
Base SKU:M-100414S
In Stock:Yes
Price: $460.00 
 
Quantity:   

Extension Kits for Mercury Models 115 Optimax Serial Number: 1B027808 and up
Extension Kits for Mercury Models 115 Optimax Serial Number: 1B027808 and up
Using compatible alloys in both the housings, shafts, and studs, these kits are as corrosion resistant as the motor itself. All shaft and studs are of stainless steel and housings are cast of the same type of alloy as used in the motors. Extension Kits for Mercury Models 115 Optimax Serial Number: 1B027808 and up - 5 Inches
 
Base SKU:MO100414
In Stock:Yes
Price: $560.00 
 
Quantity:   

Extension Kits for Mercury Models 115 Serial Number: B209468 and up
Extension Kits for Mercury Models 115 Serial Number: B209468 and up
Using compatible alloys in both the housings, shafts, and studs, these kits are as corrosion resistant as the motor itself. All shaft and studs are of stainless steel and housings are cast of the same type of alloy as used in the motors. Extension Kits for Mercury Models 115 Serial Number: B209468 and up - 5 Inches
 
Base SKU:M-100410
In Stock:Yes
Price: $540.00 
 
Quantity:   

Extension Kits for Mercury Models 1150 & 115 Serial Number: 3761035 and up
Extension Kits for Mercury Models 1150 & 115 Serial Number: 3761035 and up
Using compatible alloys in both the housings, shafts, and studs, these kits are as corrosion resistant as the motor itself. All shaft and studs are of stainless steel and housings are cast of the same type of alloy as used in the motors. Extension Kits for Mercury Models 1150 & 115 Serial Number: 3761035 and up - 5 Inches
 
Base SKU:M-100610
In Stock:No
Price: $0.00 
 
Quantity:   

Extension Kits for Mercury Models 1150 Serial Number: 3525441 and up
Extension Kits for Mercury Models 1150 Serial Number: 3525441 and up
Using compatible alloys in both the housings, shafts, and studs, these kits are as corrosion resistant as the motor itself. All shaft and studs are of stainless steel and housings are cast of the same type of alloy as used in the motors. Extension Kits for Mercury Models 1150 Serial Number: 3525441 and up - 5 Inches
 
Base SKU:ME-100609
In Stock:No
Price: $0.00 
 
Quantity:   

Extension Kits for Mercury Models 125 4 cyl. Serial Number: D283222 and up
Extension Kits for Mercury Models 125 4 cyl. Serial Number: D283222 and up
Using compatible alloys in both the housings, shafts, and studs, these kits are as corrosion resistant as the motor itself. All shaft and studs are of stainless steel and housings are cast of the same type of alloy as used in the motors. Extension Kits for Mercury Models 125 4 cyl. Serial Number: D283222 and up - 5 Inches
 
Base SKU:MP100414
In Stock:Yes
Price: $560.00 
 
Quantity:   

Extension Kits for Mercury Models 135 / 150 20" Serial Number: C100861 and up
Extension Kits for Mercury Models 135 / 150 20" Serial Number: C100861 and up
Using compatible alloys in both the housings, shafts, and studs, these kits are as corrosion resistant as the motor itself. All shaft and studs are of stainless steel and housings are cast of the same type of alloy as used in the motors. Extension Kits for Mercury Models 135 / 150 20" Serial Number: C100861 and up - 5 Inches
 
Base SKU:MMM100611
In Stock:Yes
Price: $740.00 
 
Quantity:   

Extension Kits for Mercury Models 135 / 150 20" Serial Number: C239553 and up
Extension Kits for Mercury Models 135 / 150 20" Serial Number: C239553 and up
Using compatible alloys in both the housings, shafts, and studs, these kits are as corrosion resistant as the motor itself. All shaft and studs are of stainless steel and housings are cast of the same type of alloy as used in the motors. Extension Kits for Mercury Models 135 / 150 20" Serial Number: C239553 and up - 5 Inches
 
Base SKU:M1100611
In Stock:Yes
Price: $740.00 
 
Quantity:   

Extension Kits for Mercury Models 135 / 150 XR6 Serial Number: DO82000 and up
Extension Kits for Mercury Models 135 / 150 XR6 Serial Number: DO82000 and up
Using compatible alloys in both the housings, shafts, and studs, these kits are as corrosion resistant as the motor itself. All shaft and studs are of stainless steel and housings are cast of the same type of alloy as used in the motors. Extension Kits for Mercury Models 135 / 150 XR6 Serial Number: DO82000 and up - 5 Inches
 
Base SKU:MMC100611
In Stock:Yes
Price: $740.00 
 
Quantity:   

Extension Kits for Mercury Models 135 / 150 XR6 Serial Number: OG303046 and up
Extension Kits for Mercury Models 135 / 150 XR6 Serial Number: OG303046 and up
Using compatible alloys in both the housings, shafts, and studs, these kits are as corrosion resistant as the motor itself. All shaft and studs are of stainless steel and housings are cast of the same type of alloy as used in the motors. Extension Kits for Mercury Models 135 / 150 XR6 Serial Number: OG303046 and up - 5 Inches
 
Base SKU:MCC100611
In Stock:Yes
Price: $740.00 
 
Quantity:   

Extension Kits for Mercury Models 135 \ 150 20" Serial Number: A904646 and up
Extension Kits for Mercury Models 135 \ 150 20" Serial Number: A904646 and up
Using compatible alloys in both the housings, shafts, and studs, these kits are as corrosion resistant as the motor itself. All shaft and studs are of stainless steel and housings are cast of the same type of alloy as used in the motors. Extension Kits for Mercury Models 135 \ 150 20" NEW MODEL Serial Number: A904646 and up - 5 Inches
 
Base SKU:MM-100611
In Stock:No
Price: $719.00 
 
Quantity:   

Extension Kits for Mercury Models 135 20" Optimax Serial Number: 1B073074 and up
Extension Kits for Mercury Models 135 20" Optimax Serial Number: 1B073074 and up
Using compatible alloys in both the housings, shafts, and studs, these kits are as corrosion resistant as the motor itself. All shaft and studs are of stainless steel and housings are cast of the same type of alloy as used in the motors. Extension Kits for Mercury Models 135 20" Optimax Serial Number: 1B073074 and up - 5 Inches
 
Base SKU:M2100611
In Stock:Yes
Price: $740.00 
 
Quantity:   

Extension Kits for Mercury Models 140 Serial Number: 4865678 and up
Extension Kits for Mercury Models 140 Serial Number: 4865678 and up
Using compatible alloys in both the housings, shafts, and studs, these kits are as corrosion resistant as the motor itself. All shaft and studs are of stainless steel and housings are cast of the same type of alloy as used in the motors. Extension Kits for Mercury Models 140 Serial Number: 4865678 and up - 5 Inches
 
Base SKU:M100610
In Stock:No
Price: $0.00 
 
Quantity:   

Extension Kits for Mercury Models 1400 Serial Number: 3293234 and up
Extension Kits for Mercury Models 1400 Serial Number: 3293234 and up
Using compatible alloys in both the housings, shafts, and studs, these kits are as corrosion resistant as the motor itself. All shaft and studs are of stainless steel and housings are cast of the same type of alloy as used in the motors. Extension Kits for Mercury Models 1400 Serial Number: 3293234 and up - 5 Inches
 
Base SKU:MO100609
In Stock:No
Price: $0.00 
 
Quantity:   

Extension Kits for Mercury Models 150 20" Optimax Serial Number: 1B106925 and up
Extension Kits for Mercury Models 150 20" Optimax Serial Number: 1B106925 and up
Using compatible alloys in both the housings, shafts, and studs, these kits are as corrosion resistant as the motor itself. All shaft and studs are of stainless steel and housings are cast of the same type of alloy as used in the motors. Extension Kits for Mercury Models 150 20" Optimax Serial Number: 1B106925 and up - 5 Inches
 
Base SKU:MMRR100611
In Stock:Yes
Price: $740.00 
 
Quantity:   

Extension Kits for Mercury Models 150 4 stroke NEW MODEL Serial Number: New Model
Extension Kits for Mercury Models 150 4 stroke NEW MODEL Serial Number: New Model
Using compatible alloys in both the housings, shafts, and studs, these kits are as corrosion resistant as the motor itself. All shaft and studs are of stainless steel and housings are cast of the same type of alloy as used in the motors. Extension Kits for Mercury Models 150 4 stroke NEW MODEL Serial Number: New Model - 5 Inches
 
Base SKU:M-100615
In Stock:Yes
Price: $900.00 
 
Quantity:   

Extension Kits for Mercury Models 150 V-6 20" Serial Number: 4868998 and up
Extension Kits for Mercury Models 150 V-6 20" Serial Number: 4868998 and up
Using compatible alloys in both the housings, shafts, and studs, these kits are as corrosion resistant as the motor itself. All shaft and studs are of stainless steel and housings are cast of the same type of alloy as used in the motors. Extension Kits for Mercury Models 150 V-6 20" Serial Number: 4868998 and up - 5 Inches
 
Base SKU:M-100611
In Stock:Yes
Price: $740.00 
 
Quantity:   

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