GLM Marine

Oil Seal (86840) 86840

Country of Origin:

Taiwan

Satisfaction rating

Aftermarket product

Product	Price	Rating	Comment
Mercury Marine 66022 Bearing Carrier Oil Seal Genuine OEM product	$10.23~~$12.79~~ In stock Only 2 remaining	Best	OEM Mercury 26-66022 bearing‑carrier oil seal. Verified replacement for superseded F346118 and used on many 3.9–15 hp Mercury/Mariner gearcases. Photo shows the expected Mercury branding; construction is a metal‑cased, spring‑loaded lip that holds gear oil in and keeps water out. Choose this when you want factory tolerances and known durability. Install tip: lightly lube the lip and orient the spring toward the oil, then press squarely to avoid cocking. ([leadersrpmshop.com](https://leadersrpmshop.com/mercury-marine-mercruiser-new-oem-bearing-carrier-oil-seal-f346118-26-66022/?utm_source=openai))
OEM Mercury 26-66022 bearing‑carrier oil seal. Verified replacement for superseded F346118 and used on many 3.9–15 hp Mercury/Mariner gearcases. Photo shows the expected Mercury branding; construction is a metal‑cased, spring‑loaded lip that holds gear oil in and keeps water out. Choose this when you want factory tolerances and known durability. Install tip: lightly lube the lip and orient the spring toward the oil, then press squarely to avoid cocking. ([leadersrpmshop.com](https://leadersrpmshop.com/mercury-marine-mercruiser-new-oem-bearing-carrier-oil-seal-f346118-26-66022/?utm_source=openai))
GLM Marine 86840 Oil Seal (86840) (viewing this product) Aftermarket product	$6.34~~$7.93~~ Cross Ship Leaves in 3-5 days Please update to verify the current stock status. Product availability has not been checked in more than 7 days.	Better	GLM’s aftermarket seal is stamped “NAK SM8 0.563 1.000 0.315,” which matches the Mercury bore/shaft/width spec and identifies an SM‑style seal (metal‑cased, single lip with garter spring). The sample shows smoother machining and a thin pre‑applied grease film—good practice to prevent a dry start on first rotation. NAK is an established OE‑grade seal manufacturer, so materials and tolerances are typically consistent. A strong value if you don’t require OEM branding. ([glmmarine.com](https://www.glmmarine.com/MercuryMarinerForce/files/basic-html/page210.html?utm_source=openai))
GLM’s aftermarket seal is stamped “NAK SM8 0.563 1.000 0.315,” which matches the Mercury bore/shaft/width spec and identifies an SM‑style seal (metal‑cased, single lip with garter spring). The sample shows smoother machining and a thin pre‑applied grease film—good practice to prevent a dry start on first rotation. NAK is an established OE‑grade seal manufacturer, so materials and tolerances are typically consistent. A strong value if you don’t require OEM branding. ([glmmarine.com](https://www.glmmarine.com/MercuryMarinerForce/files/basic-html/page210.html?utm_source=openai))

$6.34~~$7.93~~

You save 20%($1.59)

-20%

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30 day return policy

PartX Alternatives — This part: Better

Ratings provided by PartX™

Product	Price	Rating	Comment
Mercury Marine 66022 Bearing Carrier Oil Seal Genuine OEM product	$10.87~~$12.79~~ In stock Only 2 remaining	Best	OEM Mercury 26-66022 bearing‑carrier oil seal. Verified replacement for superseded F346118 and used on many 3.9–15 hp Mercury/Mariner gearcases. Photo shows the expected Mercury branding; construction is a metal‑cased, spring‑loaded lip that holds gear oil in and keeps water out. Choose this when you want factory tolerances and known durability. Install tip: lightly lube the lip and orient the spring toward the oil, then press squarely to avoid cocking. ([leadersrpmshop.com](https://leadersrpmshop.com/mercury-marine-mercruiser-new-oem-bearing-carrier-oil-seal-f346118-26-66022/?utm_source=openai))
OEM Mercury 26-66022 bearing‑carrier oil seal. Verified replacement for superseded F346118 and used on many 3.9–15 hp Mercury/Mariner gearcases. Photo shows the expected Mercury branding; construction is a metal‑cased, spring‑loaded lip that holds gear oil in and keeps water out. Choose this when you want factory tolerances and known durability. Install tip: lightly lube the lip and orient the spring toward the oil, then press squarely to avoid cocking. ([leadersrpmshop.com](https://leadersrpmshop.com/mercury-marine-mercruiser-new-oem-bearing-carrier-oil-seal-f346118-26-66022/?utm_source=openai))
GLM Marine 86840 Oil Seal (86840) (viewing this product) Aftermarket product	$6.34~~$7.93~~ Cross Ship Leaves in 3-5 days Please update to verify the current stock status. Product availability has not been checked in more than 7 days.	Better	GLM’s aftermarket seal is stamped “NAK SM8 0.563 1.000 0.315,” which matches the Mercury bore/shaft/width spec and identifies an SM‑style seal (metal‑cased, single lip with garter spring). The sample shows smoother machining and a thin pre‑applied grease film—good practice to prevent a dry start on first rotation. NAK is an established OE‑grade seal manufacturer, so materials and tolerances are typically consistent. A strong value if you don’t require OEM branding. ([glmmarine.com](https://www.glmmarine.com/MercuryMarinerForce/files/basic-html/page210.html?utm_source=openai))
GLM’s aftermarket seal is stamped “NAK SM8 0.563 1.000 0.315,” which matches the Mercury bore/shaft/width spec and identifies an SM‑style seal (metal‑cased, single lip with garter spring). The sample shows smoother machining and a thin pre‑applied grease film—good practice to prevent a dry start on first rotation. NAK is an established OE‑grade seal manufacturer, so materials and tolerances are typically consistent. A strong value if you don’t require OEM branding. ([glmmarine.com](https://www.glmmarine.com/MercuryMarinerForce/files/basic-html/page210.html?utm_source=openai))

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Supersession Chain

Name	SKU	Superseding SKU
Oil Seal (86840)Viewing this product	86840	Current

Oil Seal (86840) 86840

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Supersession Chain

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