Upper Gear Set, 1.47 Ratio, 20/22 Tooth for MerCruiser Alpha One Gen II sterndrives. The matched gears transfer drive through the upper unit at the specified 1.47 ratio and 20/22 tooth combination. Use product code REC43-853641A2 to identify the offered product. It cross-references to MerCruiser 43-853641A2. Selection warning: This is a ratio-specific upper gear set. Match the ratio and printed tooth count before ordering. Product specifications Product Upper Gear Set, 1.47 Ratio, 20/22 Tooth Product code REC43-853641A2 Assembly area Upper gear and driveshaft assembly Key points Product code: REC43-853641A2 MerCruiser cross-reference: 43-853641A2 Confirmed application: Alpha One Gen II, serial number 0L100040 and later Assembly area: Upper gear and driveshaft assembly Installation and selection context The upper gear set, 1.47 ratio, 20/22 tooth under product code REC43-853641A2 belongs to the upper gear and driveshaft assembly. Match the drive ratio and tooth count, not appearance alone. Compatibility and fitment Equipment MerCruiser Alpha One Gen II sterndrive Confirmed range Serial number 0L100040 and later, 1998 onwards Assembly area Upper gear and driveshaft assembly Drive ratio and teeth 1.47 ratio, 20/22 teeth The confirmed application for Upper Gear Set, 1.47 Ratio, 20/22 Tooth under product code REC43-853641A2 is the drive and serial scope shown above. The product may have other applications where the same product code and cross-reference are independently confirmed. What to check before ordering Confirm the upper gear set, 1.47 ratio, 20/22 tooth under product code REC43-853641A2 against the component being replaced. Match the drive ratio and tooth count, not appearance alone. Part numbers and cross-references Product code REC43-853641A2 MerCruiser cross-reference 43-853641A2 OEM references are provided for identification. A cross-reference does not mean the item is supplied as a genuine OEM product. Before ordering Confirm the sterndrive model and full serial number. Check product code REC43-853641A2 and every recorded MerCruiser cross-reference. Apply the ratio, side, material or serial-break instruction where one is stated. Compare the replacement part with the component being removed. Contact TMP Global with the drive serial and photographs if any identifier differs. Frequently asked questions What does REC43-853641A2 replace? It cross-references to MerCruiser 43-853641A2. Does REC43-853641A2 fit every MerCruiser Alpha One Gen II drive? The confirmed application for REC43-853641A2 covered here is the MerCruiser Alpha One Gen II upper driveshaft housing for serial number 0L100040 and later. For an earlier drive or another assembly, match the product code, OEM reference and technical data before ordering. Where can I see this part in the exploded diagram assembly? View the MerCruiser Alpha One Gen II upper driveshaft housing exploded diagram and locate reference 7.
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