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Yamaha F75-F115 Intake Valve Stem Seal OEM K0A-A3721-00-00
Yamaha F75-F115
1999-2016
| Quantity | Price |
| 1 | 3.75 |
Genuine Yamaha OEM Intake Valve Stem Seal
Yamaha F75-F115 Intake Valve Stem Seal - OEM K0A-A3721-00-00
The Yamaha K0A-A3721-00-00 Intake Valve Stem Seal is a genuine OEM replacement seal for select Yamaha four-stroke outboard cylinder heads.
Verified applications include select F75, F80, F90, F100, F115 and LF115 Yamaha four-stroke engines.
Pro Marine also stocks an aftermarket replacement, A3721, along with the matching exhaust valve seals, valve spring, intake valve and exhaust valve used during cylinder-head rebuilding.
OEM Number: K0A-A3721-00-00
Application: Intake Valve Stem
Engine Families: Yamaha F75-F115 and LF115
OEM Number
| Brand / Type | Part Number |
|---|---|
| Yamaha OEM | K0A-A3721-00-00 |
| Pro Marine Aftermarket Option | A3721 |
Yamaha Outboard Fitment
| Engine Family | Verified Applications |
|---|---|
| F75 |
F75TLRB - 2003 F75TLRC - 2004 F75TLRD - 2005 F75LA / F75LA_0112 - 2006-Present F75TLR / F75TLR_041 - 2006-Present |
| F80 |
F80TLRX / F80TXRX - 1999 F80TLRY / F80TXRY - 2000 F80TLRZ - 2001 F80TJRA / F80TLRA - 2002 F80TJRB / F80TLRB - 2003 |
| F90 |
F90TJRB / F90TLRB - 2003 F90TJRC / F90TLRC - 2004 F90TJRD / F90TLRD / F90TXRD - 2005 F90JA / F90JA_0112 - 2006-Present F90LA / F90LA_0112 - 2006-Present F90TJR / F90TJR_041 - 2006-Present F90TLR / F90TLR_041 - 2006-Present F90TXR / F90TXR_041 - 2006-Present F90XA / F90XA_0112 - 2006-Present |
| F100 |
F100TLRX / F100TXRX - 1999 F100TLRY / F100TXRY - 2000 F100TLRZ / F100TXRZ - 2001 F100TLRA / F100TXRA - 2002 F100TLRB / F100TXRB - 2003 |
| F115 - Early |
F115TLRY / F115TXRY - 2000 F115TLRZ / F115TXRZ - 2001 F115TJRA / F115TLRA / F115TXRA - 2002 F115TJRB / F115TLRB / F115TXRB - 2003 F115TJRC / F115TLRC / F115TXRC - 2004 F115TJRD / F115TLRD / F115TXRD - 2005 |
| F115 - Later | F115JA, F115LA, F115TJR, F115TLR, F115TXR and F115XA applications from 2006-Present, including supplied 011, 061, 04 and 0405-0411 suffix variants. |
| LF115 |
LF115TXRY - 2000 LF115TXRZ - 2001 LF115TXRA - 2002 LF115TXRB - 2003 LF115TXRC - 2004 LF115TXRD - 2005 LF115TXR / LF115TXR_0 / 0405-0407 - 2006-Present LF115XA / LF115XA_01 / LF115XA_06 - 2006-Present |
Verify the complete Yamaha model number before ordering. Yamaha used different cylinder-head and valve-train components across similar horsepower families.
Confirm that your engine application calls for K0A-A3721-00-00.
Aftermarket Pro Marine Option
Pro Marine Intake Valve Stem Seal - A3721
Pro Marine aftermarket replacement for the compatible Yamaha OEM intake valve stem seal application.
Brand: Pro Marine
Type: Intake Valve Stem Seal
Related Cylinder Head Rebuild Parts
Pro Marine Valve Spring - 67F-12114P
Replacement valve spring for compatible Yamaha F75-F115 four-stroke cylinder heads.
OEM: 67F-12114-00-00
View Valve Spring
Yamaha OEM Exhaust Valve Stem Seal
Genuine Yamaha OEM exhaust-side valve stem seal for compatible four-stroke cylinder heads.
Brand: Yamaha OEM
View OEM Exhaust Valve Seal
Pro Marine Exhaust Valve Stem Seal - A3722
Aftermarket exhaust valve stem seal for compatible Yamaha four-stroke engines.
Brand: Pro Marine
View Pro Marine Exhaust Seal
Pro Marine Intake Valve - 68V-12111P
Length: 96.9mm
Head Diameter: 29mm
Replacement intake valve for compatible Yamaha four-stroke cylinder-head rebuilds.
View Intake Valve
Pro Marine Exhaust Valve - 68V-12121P
Length: 99.3mm
Head Diameter: 23.9mm
Replacement exhaust valve for compatible Yamaha four-stroke cylinder-head rebuilds.
View Exhaust ValveValve Train Service Components
| Component | OEM / Aftermarket Option |
|---|---|
| Intake Valve Stem Seal | Yamaha OEM K0A-A3721-00-00 / Pro Marine A3721 |
| Exhaust Valve Stem Seal | Yamaha OEM K0A-A3722 / Pro Marine A3722 |
| Valve Spring | Pro Marine 67F-12114P |
| Intake Valve | Pro Marine 68V-12111P |
| Exhaust Valve | Pro Marine 68V-12121P |
What This Part is Used For
The intake valve stem seal fits around the intake valve stem and helps control the amount of engine oil that passes between the valve stem and valve guide.
The seal must allow enough lubrication for the valve stem and guide while limiting excessive oil from entering the intake port and combustion chamber.
Symptoms of a Worn Valve Stem Seal
Valve stem seals can harden, wear or become damaged with age and heat. Excessive oil passing the seal can contribute to oil consumption and combustion-chamber deposits.
Valve seals should be inspected whenever the cylinder head is disassembled or the valves are removed.
When to Replace Valve Stem Seals
- During a complete cylinder-head rebuild
- When replacing intake or exhaust valves
- When valve guides are serviced
- If seals are hardened, cracked or damaged
- When excessive oil consumption is traced to the cylinder head
- After overheating or severe cylinder-head damage
- During a complete powerhead overhaul
Inspect These Parts During Valve Seal Replacement
- Intake valve stems
- Exhaust valve stems
- Valve guides
- Valve seats
- Valve springs
- Valve spring retainers
- Valve keepers
- Camshaft lobes
- Camshaft journals
- Cylinder-head sealing surface
Shop Yamaha Engine Rebuild Parts by Model
Pro Marine stocks pistons, piston rings, bearings, cylinder sleeves, valves, valve stem seals, gaskets and other internal Yamaha four-stroke engine components.
Shop Yamaha Engine Rebuild Parts by Model
Key Features
- Genuine Yamaha OEM intake valve stem seal
- OEM number K0A-A3721-00-00
- Fits select Yamaha F75 applications
- Fits select Yamaha F80 applications
- Fits select Yamaha F90 applications
- Fits select Yamaha F100 applications
- Fits extensive Yamaha F115 applications
- Fits Yamaha LF115 applications
- Pro Marine A3721 aftermarket option linked above
- Matching exhaust valve seals linked above
- Valve spring linked above
- Replacement intake and exhaust valves linked above
FAQ
What is the Yamaha OEM number for this intake valve seal?
The OEM number is K0A-A3721-00-00.
Is this a genuine Yamaha part?
Yes. This listing is for the Yamaha OEM intake valve stem seal.
Do you have an aftermarket version?
Yes. The Pro Marine A3721 aftermarket intake valve stem
seal is linked above.
Does this fit Yamaha F115?
Yes. The supplied fitment includes extensive F115 applications from
early engines through later model variants.
Does this seal fit Yamaha F75, F80, F90 and F100?
Yes. Select applications from each of those engine families are included
in the verified fitment above.
Does this fit LF115 engines?
Yes. Multiple LF115 applications are included in the supplied fitment.
Do you stock the exhaust valve seal?
Yes. Both the Yamaha OEM K0A-A3722 and
Pro Marine A3722 exhaust valve seals are linked above.
Do you have the valves for these engines?
Yes. The 68V-12111P intake valve and
68V-12121P exhaust valve are linked above.
Do you stock the valve spring?
Yes. The Pro Marine 67F-12114P valve spring is linked above.
Dealer Discounts & Store Policies
Dealer / Marine Industry Discounts
Are you a marine dealer, technician, boat builder, or industry professional? We offer dealer pricing for qualified marine businesses.
Shipping Policy
- Free shipping on orders over $100 in the continental U.S.
- Orders received before 5:30 PM EST ship the same business day.
- Typical delivery time is 1-5 business days.
30-Day Return Policy
- Returns accepted within 30 days of delivery.
- Parts must be new, unused and in original packaging.
- Installed parts are not returnable.
- Return authorization is required before returning parts.
Need help verifying fitment?
Contact Pro Marine
Phone: 941-721-3000
Searchable Part Numbers & Terms
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