Ql78yc Marine Spark Plug
MaybeSearch demand grew +175.7% this quarter. But the top 5 products take 90% of clicks, so Ql78yc Marine Spark Plug is a Maybe.
- Flapen Score
- 59 / 100Top 11% of 7,287 Automotive niches · +10 vs the category median of 4959
- Market size
- $35K/yr11K searches / yr
- 90-day growth
- +175.7%search demand this quarter
- Competition
- 90%top-5 click share · 7 brands · 27 sellers
Flapen Score
Ql78yc Marine Spark Plug against its category
The dotted line is the Automotive average. Past it, Ql78yc Marine Spark Plug is stronger. Inside it, weaker.
Market
The Ql78yc Marine Spark Plug market on Amazon at a glance
Shoppers on Amazon United States searched for Ql78yc Marine Spark Plug 11K times last year and spent an estimated $35K. The top 5 brands take 95% of clicks. Flapen scores it 59 out of 100, a Maybe.
01 · Demand
An estimated 14.1% of those searches ended in a purchase.
Shoppers searched for this 11K times in the last 12 months. That counts every search on Amazon United States for this niche's terms. An estimated 14.1% of those searches ended in a purchase. Searches in the last 90 days moved +175.7% against the 90 days before. Searches, conversion and average price together put the market at an estimated $35K a year.
- Searches, last 12 months
- 11K
- Growth, 90 days vs prior 90
- +175.7%
- Conversion, latest week
- 14.1%
- Market size, estimated
- $35Ka year
- Top search term
- ql78yc marine spark plug5K searches a year
02 · Price
A sale here is worth $23.17.
Listings sell for $23.17 on average, from $16.65 to $31.76. Amazon reports units sold in ranges. This niche sold 2K to 2K a year. The average listing sells 100 to 250 of them. At $23.17 that is $2K to $6K a year per listing.
- Average price
- $23.17inside the $15 to $100 sweet spot
- Price range
- $16.65–$31.76
- Amazon United States median price
- $24.38across 115,062 niches
- Units sold a year
- 2K–2K
- Units per listing a year
- 100–250
- Revenue per listing a year
- $2K–$6K
- Returns
- 1.5%of orders · Amazon United States median 2.1%
03 · Entry bar
The bar here is low.
89% of listings pay for placement with sponsored ads. 78% ship with Prime. On an average day, 14.0% of listings are out of stock. The average listing ranks #1,166 within Ignition Parts. It carries 115 reviews at 4.21 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 89%
- Prime listings
- 78%
- Out of stock, average day
- 14.0%
- Average rank
- #1,166in Ignition Parts
- Average rating
- 4.21 starsAmazon United States average 4.42 stars
- Average reviews
- 115per listing
- Listings tracked
- 9
04 · Newcomers
0 of last year's 1 launches cleared the first-year sales bar.
1 products launched here in the last 12 months. 0 of them cleared the first-year sales bar, our mark for a successful launch. The brands on the shelf have sold for 41 months on average, so the names here are settling in.
- Launched, last 12 months
- 1
- Successful launches
- 0Amazon's first-year sales bar
- Average brand age
- 41 months
Products
Top Ql78yc Marine Spark Plug products & what they sell for
The products selling here, as shoppers see them on Amazon. Shelf share and sales are our estimates.
Prices and ratings read from Amazon on Jul 11, 2026. The live listing can differ.
Top sellers
by estimated 90-day click share
Champion QL78YC Spark Plug Pack of 4
- Price
- $18.54
- Rating
- 4.7/5
- Reviews
- 438
- Age
- 19y ago

SPARK PLUGS 6 PACK MARINE ENGINES 24 QL78YC 938M OUTBOARDS INBOARD I/O CHAMPION
- Price
- $29.67
- Rating
- 4.7/5
- Reviews
- 188
- Age
- 6y ago

Champion QL78YC (938M) Marine 8 Pack
- Price
- $31.76
- Rating
- 4.6/5
- Reviews
- 200
- Age
- 14y ago

8PCS Iridium Spark Plugs Fit for Johnson Evinrude Mercury Marine Outboard Engines Replacement for QL78YC 938M
- Price
- $22.65
- Rating
- 4.2/5
- Reviews
- 9
- Age
- 1y ago

BDFHYK QL78YC Iridium Spark Plugs Compatible with Mercury Evinrude Johnson Mariner OMC Set of 4
- Price
- $16.65
- Rating
- 4.4/5
- Reviews
- 17
- Age
- 1y ago
Trending
estimated 90-day click momentum
Champion QL78C L78C BH8S (807M) Marine 8 Pack
- Price
- $28.42
- Rating
- 3.3/5
- Reviews
- 10
- Age
- 12y ago

8PCS Iridium Spark Plugs Fit for Johnson Evinrude Mercury Marine Outboard Engines Replacement for QL78YC 938M
- Price
- $22.65
- Rating
- 4.2/5
- Reviews
- 9
- Age
- 1y ago

Champion QL78YC Spark Plug Pack of 4
- Price
- $18.54
- Rating
- 4.7/5
- Reviews
- 438
- Age
- 19y ago

SYKRSS QL78YC Marine Spark Plugs 4 Pack - Compatible with Mercury/Mariner EFI Evinrude 10-225HP (1973-2001) Johnson 10E-90HP (1974-2005) - Replaces QL77JC4 for 2/4-Stroke Outboard Motors
- Price
- $16.71
- Rating
- 4.2/5
- Reviews
- 157
- Age
- 9mo ago

SPARK PLUGS 6 PACK MARINE ENGINES 24 QL78YC 938M OUTBOARDS INBOARD I/O CHAMPION
- Price
- $29.67
- Rating
- 4.7/5
- Reviews
- 188
- Age
- 6y ago
Newest
by launch date
SYKRSS QL78YC Marine Spark Plugs 4 Pack - Compatible with Mercury/Mariner EFI Evinrude 10-225HP (1973-2001) Johnson 10E-90HP (1974-2005) - Replaces QL77JC4 for 2/4-Stroke Outboard Motors
- Price
- $16.71
- Rating
- 4.2/5
- Reviews
- 157
- Age
- 9mo ago

8PCS Iridium Spark Plugs Fit for Johnson Evinrude Mercury Marine Outboard Engines Replacement for QL78YC 938M
- Price
- $22.65
- Rating
- 4.2/5
- Reviews
- 9
- Age
- 1y ago

8 Pack ql78yc marine spark plug - 938M Replacement for champion ql78yc Compatible with Johnson Evinrude Mercury Marine Engines (Outboard/Inboard) Replaces BPZ8HS10 Wont fit Ford 150
- Price
- $21.53
- Rating
- 4.2/5
- Reviews
- 9
- Age
- 1y ago

BDFHYK QL78YC Iridium Spark Plugs Compatible with Mercury Evinrude Johnson Mariner OMC Set of 4
- Price
- $16.65
- Rating
- 4.4/5
- Reviews
- 17
- Age
- 1y ago

YUXIVCNE 6 Pack Spark Plugs QL78YC 938M Replacement for Johnson Evinrude for Mercury Outboards Inboard Marine Engines Parts Replace BPZ8HS10
- Price
- $22.63
- Rating
- 3.6/5
- Reviews
- 11
- Age
- 1y ago
Competition
Competition: brands, sellers & click share
The top 5 products take an estimated 90% of clicks. A locked shelf that new listings rarely crack.
Brands
7 rising
Sellers
27
Est. top-5 brand share
95%
Top 20: 100%
Est. top-5 click share
90%
Top 20: 100%
Open market
2%
- Champion53%
- MEILAN30%
- yeeluzan6%
- BDFHYK3%
- UMONIE3%
- SYKRSS3%
- Open — no brand owns it (1 brand, 2%)
Search terms
Top Ql78yc Marine Spark Plug search terms shoppers use
The exact words shoppers type, with estimated yearly volume, growth, and conversion.
- ql78yc marine spark plug5K/yr
- ql78yc3K/yr
- champion ql78yc3K/yr
Reviews and returns
What reviews say buyers love and hate about Ql78yc Marine Spark Plug
We read the reviews and the return reasons for every product selling here.
“They weren't very efficient”
Every topic
Every topic buyers talk about, one row each.
Red shows the share of negative reviews and green the share of positive reviews, biggest topic first. Open a row to read what they wrote.
12 topics
Keep looking
Related niches
Niches in the same category that score near this one. Research these next.
Best Flapen score
The highest-scoring niches we track right now, across every category.
FAQ
Common Ql78yc Marine Spark Plug questions
Answered from the same tracked data.
Figures on this page are estimates modeled from public Amazon pages and third-party keyword data. Amazon does not supply them, and no connected seller's data is used. How we handle Amazon data









