mercruiser 3.0 tune up kit
Worth a lookShows demand growing +193.1% this quarter, but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Growth
Incredible+193.1%90-day search growth — must beat 0% to launch
Returns
Great1.2%return rate — above 6% kills the launch gate
Avg price
Great$63.52avg listing price — sweet spot $15–$100
Conversion
Great9.8%search→purchase rate — share of searches ending in a sale
Review moat
Great430.83avg incumbent reviews — the moat a new listing must climb
Price range
Okay$3.76–$215.79cheapest to priciest tracked listing — scored on the share inside $15–$100
Market size
Okay$198K$198K/yr · 32K searches
Quality gap
Okay4.5★avg incumbent rating — lower means beatable quality
Brand share
Okay87%top-5 brand share — brands hold most of the demand
Competition
Bad77%top-5 click share — a locked-up shelf
Competition
The top 5 products capture 77% of clicks — a locked-up shelf that new listings rarely crack.Brands
9 falling
Sellers
37
Top-5 brand share
87%
Open market
9%
- Quicksilver47%
- RPS13%
- MERCURY12%
- Generic8%
- Midnight Marine6%
- AIB2C4%
- Open — no brand owns it (3 brands, 9%)
Product shelf
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
All 12 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Quicksilver 866340Q03 Sterndrive and Inboard Spin-On Oil Filter for MerCruiser and GM Marine Engines
Quicksilver$9.834.8★3,058 rev
Mercury 866340K01 4-Stroke Engine Oil Filter for MerCruiser Sterndrive and Inboard Engines
MERCURY$17.694.8★605 rev
Tune Up Kit with NGK BPR6EFS spark plugs distributor cap rotor and spark plug Wires Mercruiser 3.0L LX Replaces 811635Q2 816761Q14
RPS$85.374.4★109 rev
Mercruiser 3.0L / LX OEM Service Kit Alpha One Gen 2/Delco EST IGN: Fuel & Oil Filter Alpha Impeller Kit Distributor Cap/Rotor Spark Plugs & Wires Bayliner SeaRay Larson
Midnight Marine$215.794.8★7 rev
RPS Tune Up Kit for MerCruiser & OMC 2.5L 3.0L 3.7L Engines (1963-1989) | Distributor Cap Rotor Points Condenser & Spark Plug Wires | Replaces Part 393-9459Q1 380541 18-5385
RPS$78.064.4★407 rev
Newest
by launch dateMercruiser 3.0L / LX OEM Service Kit Alpha One Gen 2/Delco EST IGN: Fuel & Oil Filter Alpha Impeller Kit Distributor Cap/Rotor Spark Plugs & Wires Bayliner SeaRay Larson
Midnight Marine$215.797 rev
2 Pcs Marine Oil Filter 35-866340K01 Compatible with Mercruiser 4- & 6- Cylinder Engines GM V8 Engines Relaces Sierra 18-7824-2
AIB2C$19.3530 rev
Tune Up Kit Distributor Cap Rotor 4X Spark Plugs 5X Spark Plug Wires Compatible with 3.0L 4cyl Mer-Cruiser Engines Made by General Motors with Delco EST Ignition Systems #811635Q2 816761Q14
Pindex$31.6215 rev
3.0L Tune UP KIT Oil Filter Ignition Coil Wires Cap Rotor Spark Plugs Compatible with MERCRUISER 3.0
Generic$137.5529 rev
Tune UP KIT Oil Filter DELCO EST Wires Cap Rotor Spark Plugs Compatible with MERCRUISER 3.0L 3.0
Generic$97.2516 rev
Trending
90-day click momentumRPS Tune Up Kit for MerCruiser & OMC 2.5L 3.0L 3.7L Engines (1963-1989) | Distributor Cap Rotor Points Condenser & Spark Plug Wires | Replaces Part 393-9459Q1 380541 18-5385
RPS$78.064.4★
ACDelco Gold MR43LTS (19355201) Marine Spark Plug
ACDelco$3.764.7★
Tune UP KIT Oil Filter DELCO EST Wires Cap Rotor Spark Plugs Compatible with MERCRUISER 3.0L 3.0
Generic$97.254.1★
Tune Up Kit with NGK BPR6EFS spark plugs distributor cap rotor and spark plug Wires Mercruiser 3.0L LX Replaces 811635Q2 816761Q14
RPS$85.374.4★
3.0L Tune UP KIT Oil Filter Ignition Coil Wires Cap Rotor Spark Plugs Compatible with MERCRUISER 3.0
Generic$137.554.2★
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — +193.1% search growth over the last 90 days.Peak months: Apr, May, Jun, Jul · busiest ÷ quietest = 8.1×
Reviews
What buyers praise and complain about, mined from review topics.What buyers love
“Perfect fit”
“As advertised”
“This kit made servicing my 3.0LX Alpha one super easy”
“The terminals are brass which is a better quality metal that stands up to harsh Marine environments”
“Good quality”
“Item looks fine”
“Good deal”
“reliability matters a lot”
“the engine is still going strong”
What buyers complain about
“Rotor is absolute garbage”
“Boxes are obviously used”
“Very loose fitting”