Specs are compiled from manufacturer listings and verified buyer reviews and can change over time — please confirm the key details on the product page before buying.
Salt water is the slowest thief your outboard will ever meet. It works on the water pump, the anodes, the gearcase, and the fuel lines at the same time, and it does not send a warning first. The parts below are the ones that actually fit Yamaha outboards and WaveRunners, listed by what each one fixes so you can buy the right box the first time.
This guide is built by comparing the manufacturers’ published specifications and the patterns across verified customer reviews, so you get each pick’s real strengths and trade-offs instead of marketing spin.
Fitment on marine parts is unforgiving, so every entry here names the horsepower range or engine family it covers. That is the whole game with yamaha marine parts — one wrong part number turns a weekend repair into a wasted month.
Top Picks
How To Choose The Best Yamaha Marine Parts
You are not shopping for a brand here. You are shopping for a part number that matches an engine plate bolted to the back of your boat. Match the plate and the rest of the order follows.
Verify the engine plate before you spend a cent
Every Yamaha outboard carries a nameplate with model, year, and serial number stamped or printed on it. Photograph it before you open a listing. A water pump kit built for a 9.9 or 15 HP two-cylinder engine will not serve a 90 HP block, no matter how similar the photos look.
Understand OEM versus aftermarket numbering
Yamaha sells under numbers like 63V-W0078-01-00. Aftermarket makers sell the same physical part under their own catalogue code and list the Yamaha number as a cross-reference. A listing that spells out the replaced numbers is doing you a favour — that cross-reference line is how you confirm the fit.
Buy consumables in season, not in panic
Impellers, anodes, and gear lube have a service interval, and the worst time to hunt for them is the week before a trip. Stocking a spare impeller kit and a spare anode block means a haul-out does not eat your whole weekend.
Read the fluid specs, not the bottle colour
Marine oil and gear lube carry a viscosity grade on the label, such as 10W-40 or 75W-90. That grade plus the engine family is what tells you if a bottle belongs in your motor. Automotive oils are a different formulation and are not the same product.
Side-by-Side Comparison
| Model | Best For | Yamaha Fitment | Viscosity / Key Grade | Volume / Packs | Amazon |
|---|---|---|---|---|---|
| Yamalube 10W-40 4W WaterCraft Oil★ Best Overall | WaveRunner and boat engine oil changes | Four-stroke WaveRunner and Yamaha Boat engines | 10W-40 | 1 gallon (128 fl oz) | Amazon |
| S3213 Fuel Water Separator KitSmartest Fuel Fix | Cleaning fuel before it reaches the engine | Yamaha, Mercury, Suzuki, Racor, Sierra outboards | 10-micron filter, 3/8″ NPT | 1 kit | Amazon |
| 63V-W0078-01-00 Water Pump Impeller KitSmall Motor Specialist | Rebuilding the pump on a small Yamaha | Yamaha 9.9 and 15 HP, 2/4 stroke, 2 cylinders | Rubber impeller, OEM-replacement numbers | 1 kit | Amazon |
| Trim & Tilt Relay | Fixing a trim motor that will not move | Yamaha 30–90 HP motors, 1992 and up | 2 terminals, plug-in mount | 1 relay | Amazon |
| Seachoice Anode Kit | Saltwater corrosion protection | Yamaha 150–200 HP | Aluminum, cadmium-free, Mil-Spec A-24779(SH) | 1 kit | Amazon |
| NGK Spark Plug LFR7A Set of 4 | Ignition refresh on a Yamaha PWC | FX Cruiser SVHO, FX SVHO, GP-R SVHO | Copper core, LFR7A / 92038 | 4 plugs | Amazon |
| Yamalube Lower Unit Gearcase Lube Kit | Gearcase service with a pump included | Yamaha outboards 250 HP or less (not 4.2L V6) | 75W-90 | 1 quart (32 fl oz) | Amazon |
| Water Pump Repair Kit 692-W0078-02-00 | Full cooling-system rebuild on mid-size motors | Yamaha 2-stroke 60–90 HP outboards | Marine-grade hardened nylon and neoprene | 1 kit | Amazon |
| Yamalube F30-F70 10W-30 Oil Change Kit | A complete, one-box oil service | Yamaha F30–F70 four-stroke family | 10W-30 | 3 quarts | Amazon |
Detailed Reviews
1. Yamaha Yamalube 10W-40 Engine Oil
Our pick — 4.5+★ from 950+ verified ratings; the strongest balance of quality and price.
The 10W-40 gallon jug for four-stroke WaveRunner and Yamaha Boat oil changes.
This is a 10W-40 mineral oil built specifically for four-stroke WaveRunner and Yamaha Boat engines, sold in a 1-gallon bottle that holds 128 fluid ounces. Think of the 10W-40 grade as how thick the oil stays when cold versus how well it holds up when hot — the marine version is blended to keep protecting at the sustained high rpm a jet pump demands.
Yamaha formulates it with marine-specific anti-wear additives, shear-stable polymers, corrosion inhibitors, detergents, dispersants, and viscosity index improvers. In plain terms, those are the additives that stop the oil thinning out under hard running and stop salt-laden moisture from attacking internals between trips. Standard automotive oil is a different formulation, which is why the maker positions this one against harsh marine conditions.
Buyers praise the marine-specific additive package, and the 1-gallon jug covers a full service without a second bottle mid-change. The honest follow-up question is viscosity: if your engine plate calls for a different grade than 10W-40, this is the wrong jug no matter how good the oil is. Match the grade to the plate first.
What It Does Well
- Marine-specific additive package aimed at corrosion and high-rpm shear
- 1-gallon size covers a service without topping up
- It is genuine Yamaha product for Yamaha four-stroke engines
Worth Knowing First
- Fixed at 10W-40 — check your engine plate before ordering
- Mineral base, not a synthetic blend
Straight answer: buy it if your plate reads 10W-40 and you run a four-stroke WaveRunner or Yamaha boat motor.
Check first: engines calling for a different viscosity grade need a different jug, not this one.
2. S3213 Fuel Water Separator Kit
A ten-micron gatekeeper for the dirt and water that would otherwise reach your injectors.
Ten microns is the headline here. That is the size of the particles this filter captures — fine enough to pull grit and suspended water out of the fuel stream before it ever reaches the engine. The 10-micron filter media does that work while the 3/8″ NPT ports keep fuel flowing with reduced pressure drop, so you are filtering hard without starving the motor.
The housing is high-grade aluminum with multi-layer filter media inside, and the kit ships with 3/8″ barb × 1/4″ NPT brass fittings. It is listed as compatible with Yamaha, Mercury, Racor, Sierra, and Suzuki outboards, and it cross-references a stack of part numbers including Mercury 35-60494-1 and Yamaha MAR-24563-03-00. This is a universal-pattern part rather than a Yamaha-exclusive one, which widens your options but demands you check the cross-reference list carefully.
Weighing 0.94 kg, it is a substantial chunk compared with the 0.21 kg impeller kit further down this list — that heft is the aluminum bowl and bracket, not wasted packaging. Thread tape on the fittings is recommended to keep the joints dry. The one thing to plan for is maintenance: the maker advises checking the collection bowl regularly and replacing the filter annually or as needed, so treat this as a yearly item, not a fit-and-forget part.
Where the value sits: you get the separator, the brass fittings, and an aluminum housing in one box, with a one-year warranty behind it. For a part whose whole job is protecting the fuel system, the annual replacement rhythm is the real cost of ownership.
Reach for this if: you want one filter that covers a mixed fleet of Yamaha, Mercury, or Suzuki outboards.
Look elsewhere if: your engine plate demands a specific OEM bowl that is not on the cross-reference list.
3. 63V-W0078-01-00 Water Pump Impeller Kit for Yamaha 9.9 15 HP
The kit that brings a tired kicker motor’s cooling system back to life.
This one is built for a narrow slice of the Yamaha range: the 9.9 and 15 HP two- and four-stroke twins, spanning engine years from 1996 to 2024. The impeller is moulded from rubber rated to survive long immersion in salt water without breaking down. That is the whole point of a marine impeller — it lives underwater and flexes thousands of times a season, so the rubber quality is the part that decides how long your cooling system behaves.
The kit replaces a cluster of numbers including 63V-W0078-00-00, 63V-W0078-01-00, Sierra 18-3410, and Mallory 9-48609. Buyers report it performs exactly as a pump should once fitted, with the specific note that it works perfectly with a 2009 Yamaha 15hp engine. At 0.21 kg versus 0.94 kg for the fuel separator above, you are holding a small rubber impeller and its housing, nothing more.
The catch worth sizing honestly is fitment. The maker states plainly that you must confirm suitability from the engine nameplate, and the listings leave room for a mismatched order if you guess. Read the model and year off the plate, match it to the 9.9 or 15 HP two-cylinder family, and this kit does its job. Guess at it and you will be the one writing the disappointed review.
The rubber is the reason: salt-water-rated impeller compound is what separates a kit that lasts the season from one that shreds by August.
Best matched to: a 9.9 or 15 HP Yamaha kicker that needs a cooling refresh before the season starts.
Don’t force it: bigger blocks and other horsepower ranges need a different kit entirely.
4. Trim & Tilt Relay for Most Yamaha Boat Motors 30-90 HP
A two-terminal relay that turns a dead trim button back into a working one.
When the trim motor stops responding, the relay is the first thing to suspect, and this one covers a wide band of Yamaha motors — 30, 40, 50, 60, 70, 85, and 90 HP, on 1992-and-up models. It is a plug-in part with two terminals that mounts in the existing socket, so the swap is a matter of unplugging the old unit and seating the new one.
It is sold as a quality aftermarket part with a specification that meets OEM, and it operates automatically as part of the trim circuit. Functionality is what buyers care about most here, and the fit reports back that up — the relay drops into place rather than needing to be forced. Owners mention it works perfectly on a Yamaha T50TLR, which is the kind of concrete model match worth checking against your own plate.
Because it covers the 30-90 HP range in a single unit, the one thing to verify is your year. The relay is listed for 1992 and up, so an older motor falls outside the envelope. For everything in range, it is the cheapest path back to a working trim switch.
Why it earns a slot: a trim system that won’t lift makes launching genuinely awkward, and this is a plug-in part rather than a wiring job.
Pick it when: your Yamaha is a 1992-or-newer 30 to 90 HP motor with a silent trim motor.
Keep looking when: the engine predates 1992 or sits outside that horsepower spread.
5. Seachoice Anode Kit Yamaha 150-200hp
The sacrificial metal that takes the corrosion hit so your 150-200 HP block doesn’t.
Anodes are the least glamorous part on this list and the most important one in saltwater. This kit is built for Yamaha 150-200 HP engines and designed for use in salt water and brackish water. The components are aluminum and cadmium-free, and they conform to Mil-Spec A-24779(SH) — a military specification that sets out the alloy makeup of sacrificial anodes.
Buyers rate the casting quality and the flush, exact fit highest. That fit is the whole job: an anode has to sit flush and make good electrical contact, or it protects nothing. The kit is listed as a direct replacement for the factory part, manufacturer number 50-95211.
The recurring gripe is the small bolts. Several customers note they come up short, so plan on sourcing replacements if your mounting surface is thicker than stock. Keep an eye on the anodes through the season too — as a sacrificial part, they are meant to wear down and need replacing once they erode, which is exactly how they are supposed to work.
Solid Grounds
- Aluminum, cadmium-free composition
- Conforms to Mil-Spec A-24779(SH)
- Designed specifically for salt and brackish water
Plan Around This
- Small mounting bolts run short for some installations
- Anodes wear by design, so this is a recurring purchase
Buy it if: you run a 150 or 200 HP Yamaha in salt or brackish water and your anodes are eroding.
Budget a bolt run: pick up longer fasteners if your mounting points are thicker than stock.
6. NGK Spark Plug LFR7A Set of 4
Four genuine NGK plugs, matched to the SVHO engines that ask for them.
The number that matters on a plug is its heat range and thread spec, and here it is LFR7A, sold as a set of 4. That is four plugs — the full complement for the engines listed, so you are not buying two boxes to complete one service. The plugs are genuine NGK, made in Japan, with copper core construction and dependable nickel electrodes.
Fitment is specific: Yamaha FX Cruiser SVHO 2014-2019, FX Cruiser SVHO Limited 2017-2019, FX SVHO 2014-2019, and GP-R SVHO 2020-2022. They replace Yamaha part number LFR-7A000-00-00, which makes them a factory-equivalent swap rather than a generic plug. The set weighs 7.68 ounces in total, so it slips into a toolbox drawer without a thought.
The set-of-four packaging is where this one separates from a single-plug purchase — four plugs complete the job on the engines listed. Owners come back for the dependable copper-core construction and factory-equivalent LFR7A heat range. If your PWC falls outside those four model lines, this particular plug is not the one.
Straight trade-off: the plug is right for a defined list of SVHO machines and nothing wider, so a five-minute check of your model year saves a return.
Made for: FX SVHO, FX Cruiser SVHO, and GP-R SVHO owners doing a scheduled ignition service.
Not for: non-SVHO hulls or anyone whose engine calls for a different heat range.
7. Yamaha Yamalube Lower Unit Gearcase Lube
Genuine Yamaha gear lube that arrives with the pump most kits leave out.
Changing lower unit oil without a pump is a genuinely miserable job, which is why this kit earns its place. You get 1 quart (32 fluid ounces) of 75W-90 gearcase lube, 2 washers, and an Atwood pump in the same box. The 75W-90 grade is the thick gear oil that lives in the lower unit and takes the load at the prop shaft.
This is Yamalube, made by Yamaha specifically for Yamaha, and it is listed for all outboards of 250 HP or less, excluding the Yamaha 4.2L V6 outboards. The formula carries rust and corrosion inhibitors aimed at gearcase components running at high speed for long stretches in fresh or salt water. The pump is the quietly useful part — reviewers point out it worked without fuss, and the quality of the lube itself draws steady praise, including a clean match on a 2012 Yamaha 90 outboard.
At 2 pounds versus the impeller kit’s 0.21 kg, it is the heavier box, and the exclusion list is the thing to read twice. If you run a 4.2L V6, Yamaha says this is not the lube for you. Everyone else under 250 HP is in range.
What earns the pick: the included pump and washers turn a two-trip job into a one-box job, and the lube carries marine corrosion inhibitors.
Reach for it: on any Yamaha outboard up to 250 HP that is due a lower unit change.
Skip the jug: if you own a 4.2L V6 — Yamaha excludes it from this formula.
8. Water Pump Repair Kit 692-W0078-02-00
Not just an impeller — the housing, cup, plate, and seals all in one kit.
Where the small impeller kit above covers a 9.9 or 15 HP kicker, this one is aimed at the bigger two-stroke family: Yamaha 60, 70, 75, 80, 85, and 90 HP outboards. It comes with the pump housing, insert cup, face plate, water pump impeller, impeller key, bolts, washers, gaskets, and an o-ring. That is the full rebuild rather than a single wear part.
The materials are marine-grade hardened nylon and high-performance neoprene rubber. Neoprene is the flexible compound that lets the impeller vanes bend and still spring back, while the nylon housing resists the wear of the spinning rubber inside it. The kit replaces 692-W0078-02-00, 692-W0078-A0-00, 692-W0078-00-00, 692-W0078-01-00, and Sierra 18-3371, and it carries a 1-year manufacturer warranty.
The honest caveat is installation. The maker recommends professional installation and lists the lubricant you need — silicone grease, glycerin, or dish soap — separately, because it is not included. Plan for that tube before the job starts, and verify your exact model, year, and serial number against the listed ranges first. Rebuilding a cooling system to prevent overheating is a job worth doing once, correctly.
Why It’s A Full Kit
- Housing, cup, plate, impeller, key, hardware, and seals all included
- Marine-grade nylon and neoprene construction
- 1-year manufacturer warranty
Fit And Install Notes
- Professional installation recommended
- Install lubricant is not included in the box
Best suited to: a 60 to 90 HP Yamaha two-stroke due for a cooling system overhaul.
Have ready beforehand: silicone grease, glycerin, or dish soap — the kit doesn’t ship with any.
9. Yamaha Yamalube F30-F70 10W-30 Oil Change Kit
Everything for a mid-size four-stroke oil change, boxed as one purchase.
This kit is built around the Yamaha F30 to F70 four-stroke family and carries a 10W-30 viscosity grade. It holds 3 quarts of oil and is sold as a contained service kit rather than a loose bottle. Owners repeatedly note the box holds everything for the job, so there is no second trip mid-change.
The 3-quart kit costs less than buying the oil and filter separately. It is OEM Yamaha product, the maker lists the SKU as LUB-MRNSM-KT-10, and the job itself is not a long one — shoppers say roughly a 30 to 45 minute turnaround once they start.
One honest note: the accuracy of the fitment claims is the area where feedback divides. So do the homework — verify your own engine against the F30-F70 range before ordering, and read the fitment listing closely. Get that right and this kit removes most of the friction from an annual service.
Where it shines: a boxed OEM service kit that trims both the cost and the running around on a scheduled oil change.
Go for it if: you own an F30 through F70 four-stroke and want an OEM kit in one order.
Double-check first: the listed fitment against your own engine — that is the one area buyers question.
Know the Specs
Viscosity Grade
The grade on a bottle, such as 10W-40, 10W-30, or 75W-90, describes how the fluid behaves cold and hot. The number before the W covers cold-start flow; the number after covers thickness at running temperature. A marine oil is blended to protect at sustained high rpm, and the grade plus your engine family is what tells you if a bottle belongs in your motor.
Micron Rating
A fuel filter’s micron rating describes the size of the particles it can trap — a 10-micron filter catches very fine grit and suspended water that coarser filters let pass. Lower micron numbers mean finer filtration, which matters most on engines with sensitive fuel systems.
OEM Versus Aftermarket Part Numbers
A factory part carries the maker’s own number; an aftermarket part lists that number as a cross-reference. Always read the cross-reference line against your engine plate before ordering — a match there is your confirmation that the part is built for your motor.
Anodes And Mil-Spec Alloy
Anodes are sacrificial metal that corrodes before your engine’s own components do. Conformity to a military specification such as Mil-Spec A-24779(SH) sets out the alloy composition, and the components are cadmium-free.
Common Questions
How do I know if a water pump kit fits my Yamaha outboard?
What is the difference between the 9.9/15 HP impeller kit and the 60-90 HP repair kit?
Is a 10W-40 marine oil the same as ordinary automotive oil?
How often should I change the fuel water separator filter?
Can I use the lower unit gear lube on any Yamaha outboard?
What does a trim and tilt relay do, and which motors does this one fit?
Why do anodes need replacing if they still look like solid metal?
Will the NGK LFR7A plugs fit any Yamaha WaveRunner?
What comes in the F30-F70 oil change kit?
Can I install a water pump kit myself?
The Bottom Line
For most four-stroke owners, the yamaha marine parts purchase that pays off first is the Yamalube 10W-40 4W oil — a marine-specific formula in a full gallon, which keeps a high-revving WaveRunner protected between trips. If fuel contamination is your worry, the S3213 fuel water separator pulls water and fine grit out before the engine sees it. And for anyone in saltwater with a 150-200 HP block, the Seachoice anode kit is the quiet insurance that keeps corrosion off your expensive metal. Buy on fitment, not on price — a matching Yamaha part number beats a bargain every time.
How we choose
We do not accept paid placement. Every pick is matched to a real buyer and a real use-case; we do not hands-on test units.
Sources
Specifications: manufacturer listings and product documentation. Review insights: verified customer reviews, as of November 2026. Pricing: not shown on this page (it changes often); check the current price via the retailer link.
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