Vertical Shaft Engine
FailProducts sell for $760.42 on average, outside the sweet spot, so Vertical Shaft Engine is a Fail.
- Flapen Score
- 49 / 100Ranks 6,400 of 8,839 Patio, Lawn & Garden niches · −7 vs the category median of 5649
- Market size
- $141K/yr232K searches / yr
- 90-day growth
- +70.3%search demand this quarter
- Competition
- 44%top-5 click share · 6 brands · 28 sellers
Flapen Score
Vertical Shaft Engine against its category
The dotted line is the Patio, Lawn & Garden average. Past it, Vertical Shaft Engine is stronger. Inside it, weaker.
Market
The Vertical Shaft Engine market on Amazon at a glance
Shoppers on Amazon United States searched for Vertical Shaft Engine 232K times last year and spent an estimated $141K. The top 5 brands take 99% of clicks. Demand peaks in Apr–May–Jun–Jul. Flapen scores it 49 out of 100, a Fail.
01 · Demand
An estimated 0.1% of those searches ended in a purchase.
Shoppers searched for this 232K times in the last 12 months. That counts every search on Amazon United States for this niche's terms. An estimated 0.1% of those searches ended in a purchase. Searches in the last 90 days moved +70.3% against the 90 days before. Searches, conversion and average price together put the market at an estimated $141K a year.
- Searches, last 12 months
- 232K
- Growth, 90 days vs prior 90
- +70.3%
- Conversion, latest week
- 0.1%
- Market size, estimated
- $141Ka year
- Peak month
- May2.7× the quietest month
- Top search term
- vertical shaft engine42K searches a year
02 · Price
A sale here is worth $760.42.
Listings sell for $760.42 on average, from $137.71 to $3119.37. Amazon reports units sold in ranges. This niche sold 250 to 500 a year. The average listing sells 0 to 100 of them. At $760.42 that is $0 to $76K a year per listing.
- Average price
- $760.42above the $15 to $100 sweet spot
- Price range
- $137.71–$3119.37
- Amazon United States median price
- $24.38across 115,062 niches
- Units sold a year
- 250–500
- Units per listing a year
- 0–100
- Revenue per listing a year
- $0–$76K
- Returns
- 0.1%of orders · Amazon United States median 2.1%
03 · Entry bar
The bar here is low.
73% of listings pay for placement with sponsored ads. 17% ship with Prime. On an average day, 7.4% of listings are out of stock. The average listing ranks #2,914 within Farm & Ranch. It carries 148 reviews at 4.27 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 73%
- Prime listings
- 17%
- Out of stock, average day
- 7.4%
- Average rank
- #2,914in Farm & Ranch
- Average rating
- 4.27 starsAmazon United States average 4.42 stars
- Average reviews
- 148per listing
- Listings tracked
- 30
04 · Newcomers
1 of last year's 2 launches cleared the first-year sales bar.
2 products launched here in the last 12 months. 1 of them cleared the first-year sales bar, our mark for a successful launch. The brands on the shelf have sold for 35 months on average, so a newcomer is not facing entrenched names.
- Launched, last 12 months
- 2
- Successful launches
- 1Amazon's first-year sales bar
- Average brand age
- 35 months
Products
Top Vertical Shaft Engine 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 9, 2026. The live listing can differ.
Top sellers
by estimated 90-day click share
Briggs and Stratton Vertical 17.5 HP 500cc INTEK Engine 9amp 1 x 3-5/32 #31R977-0054
- Price
- $716.32
- Rating
- 4.6/5
- Reviews
- 354
- Age
- 12y ago

Briggs & Stratton 14D932-0110-F1 Professional Series 10 GT 223cc Vertical Engine
- Price
- $317.16
- Rating
- 4.2/5
- Reviews
- 8
- Age
- 2y ago

Aceup Energy Gas Engine Vertical Shaft 4.4HP 173cc 4-Stroke OHV Gas Motor with Primer for Lawn Mower EPA Compliant
- Price
- $142.53
- Rating
- 4.1/5
- Reviews
- 115
- Age
- 2y ago

Briggs & Stratton 104M02-0197 7.25tp 163cc Vertical Shaft 7/8 x 3-5/32 Inch for mowers
- Price
- $240.76
- Rating
- 4.2/5
- Reviews
- 43
- Age
- 3y ago

Briggs & Stratton 44S977-0032-G1 25 GHP Vertical Shaft Engine Black
- Price
- $1155.23
- Rating
- 4.5/5
- Reviews
- 100
- Age
- 8y ago
Trending
estimated 90-day click momentum
Aceup Energy 4.4HP 173cc 4-Stroke Gas Motor Gas Engine Vertical Shaft with Primer for Lawn Mower
- Price
- $137.71
- Rating
- 4.4/5
- Reviews
- 14
- Age
- 4mo ago

Briggs & Stratton 40N777-0027 20hp 656cc Intek Series 1 x 3-5/32 9 Amp
- Price
- $890.32
- Rating
- 4.7/5
- Reviews
- 3
- Age
- 3y ago

Briggs & Stratton 14D932-0110-F1 Professional Series 10 GT 223cc Vertical Engine
- Price
- $317.16
- Rating
- 4.2/5
- Reviews
- 8
- Age
- 2y ago

Briggs & Stratton 93J02-0001-F1 Ex Series 6.25 GT 150cc Vertical Shaft Engine
- Price
- $290.25
- Rating
- 5.0/5
- Reviews
- 1
- Age
- 1y ago

Briggs & Stratton 49T877-0049-Z1 Commercial Series 27 HP 810cc Vertical Engine
- Price
- $1418.70
- Rating
- 0.0/5
- Reviews
- 0
- Age
- 1y ago
Newest
by launch date
Aceup Energy 4.4HP 173cc 4-Stroke Gas Motor Gas Engine Vertical Shaft with Primer for Lawn Mower
- Price
- $137.71
- Rating
- 4.4/5
- Reviews
- 14
- Age
- 4mo ago

Aceup Energy 4.4HP 173cc Gas Engine Vertical Shaft 4-Stroke Gas Motor with Primer for Lawn Mower
- Price
- $138.36
- Rating
- 4.4/5
- Reviews
- 14
- Age
- 12mo ago

Briggs & Stratton 49T877-0049-Z1 Commercial Series 27 HP 810cc Vertical Engine
- Price
- $1418.70
- Rating
- 0.0/5
- Reviews
- 0
- Age
- 1y ago

Briggs & Stratton 93J02-0001-F1 Ex Series 6.25 GT 150cc Vertical Shaft Engine
- Price
- $290.25
- Rating
- 5.0/5
- Reviews
- 1
- Age
- 1y ago

24 HP 724cc Intek Series Engine 1 x 3-5/32 inch (Replaces Briggs 44N877)
- Price
- $1192.11
- Rating
- 4.5/5
- Reviews
- 8
- Age
- 1y ago
Competition
Competition: brands, sellers & click share
The top 5 products take an estimated 44% of clicks. Leaders hold, but buyers still shop past them.
Brands
6 falling
Sellers
28
Est. top-5 brand share
99%
Top 20: 100%
Est. top-5 click share
44%
Top 20: 90%
Open market
0%
- Briggs & Stratton76%
- Aceup Energy18%
- Generic2%
- Kawasaki2%
- BILT HARD2%
- LUPENGSHOP1%
Demand
Vertical Shaft Engine search demand
Weekly searches over the year, seasonality beneath. Pick a range.
Peak months: Apr, May, Jun, Jul · busiest ÷ quietest = 2.7×
Search terms
Top Vertical Shaft Engine search terms shoppers use
The exact words shoppers type, with estimated yearly volume, growth, and conversion.
- vertical shaft engine42K/yr
- lawn mower engine26K/yr
- briggs and stratton engine27K/yr
- briggs stratton replacement engines21K/yr
- vertical engine12K/yr
- vertical shaft gas engine11K/yr
- lawn mower motor9K/yr
- mower engine10K/yr
- replacement lawn mower engine7K/yr
- vertical shaft lawn mower engine9K/yr
Reviews and returns
What reviews say buyers love and hate about Vertical Shaft Engine
We read the reviews and the return reasons for every product selling here.
“which means it won't last long”
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.
17 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 Vertical Shaft Engine 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









