---
title: "onan 4000 tune up kit — Niche Verdict: Worth a look (53/100) | Amazon United States - Flapen"
canonical_url: "https://flapen.com/amazon/research/us/automotive/onan-4000-tune-up-kit"
last_updated: "2026-07-14T00:16:53.979Z"
locale: en
meta:
  description: "onan 4000 tune up kit shows a sweet-spot price point ($63.45 avg), but prices mostly outside the sweet spot ($8.25–$623.76) keeps it on the watch list."
  "og:description": "onan 4000 tune up kit shows a sweet-spot price point ($63.45 avg), but prices mostly outside the sweet spot ($8.25–$623.76) keeps it on the watch list."
  "og:title": "onan 4000 tune up kit — Niche Verdict: Worth a look (53/100) | Amazon United States - Flapen"
---

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# **onan 4000 tune up kit**

**Worth a look**

Shows a sweet-spot price point ($63.45 avg), but prices mostly outside the sweet spot ($8.25–$623.76) keeps it on the watch list.

Market size 26Growth 53Conversion 48Competition 61Returns 76Price range 14Avg price 88Brand share 54Review moat 83Quality gap 55

**Avg price**

**Great****$63.45**

avg listing price — sweet spot $15–$100

**Review moat**

**Great****340.48**

avg incumbent reviews — the moat a new listing must climb

**Returns**

**Great****1.9%**

return rate — above 6% kills the launch gate

**Competition**

**Good****49%**

top-5 click share — leaders hold, buyers still browse

**Quality gap**

**Good****4.4★**

avg incumbent rating — lower means beatable quality

**Brand share**

**Good****73%**

top-5 brand share — brands hold most of the demand

**Growth**

**Good****+24.9%**

90-day search growth — must beat 0% to launch

**Conversion**

**Okay****3.8%**

search→purchase rate — share of searches ending in a sale

**Market size**

**Okay****$108K**

$108K/yr · 44K searches

**Price range**

**Bad****$8.25–$623.76**

cheapest to priciest tracked listing — scored on the share inside $15–$100

## **Competition**

The top 5 products take 49% of clicks — established leaders, but buyers still shop beyond them.

**Brands**

**16 **▲rising

**Sellers**

**70**

**Top-5 brand share**

**73%**

**Open market**

**23%**

- Cummins37% - GPS15% - FLYINGAMZ8% - ATRACYPART7% - Topkidame5% - partszen4%

## **Product shelf**

Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.

0%10%$11K20%$22K30%$32K40%$43K1101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 25 tracked products in this niche — three views at once, no toggling.

### **Top sellers**

by 90-day click share

[1![CUMMINS NW Cummins - 149-2341-01 149234101 Onan Fuel Filter](https://m.media-amazon.com/images/I/41XO3xoXq+S.jpg)**CUMMINS NW Cummins - 149-2341-01 149234101 Onan Fuel Filter**Cummins**$25.88**4.8★1,331 rev](https://www.amazon.com/dp/B004RCT19I) [2![149-2341-01 Fuel Filter Pump Replacement For Cummins Onan model Compatible with Marquis Gold HGJAB Emerald Advantage HGJAC Marquis BGM & NHM Gasoline Generators Marquis Platinum/QG Series](https://m.media-amazon.com/images/I/419KF2vsKYL.jpg)**149-2341-01 Fuel Filter Pump Replacement For Cummins Onan model Compatible with Marquis Gold HGJAB Emerald Advantage HGJAC Marquis BGM & NHM Gasoline Generators Marquis Platinum/QG Series**FLYINGAMZ**$14.62**4.4★1,381 rev](https://www.amazon.com/dp/B07C3L2W31) [3![Carburetor Carb for Onan 146-0785 146-0803 Generator KY Series A042P619 for Onan Cummins A041D736 Microquiet 4000 Watt 4KYFA26100 4KYFA26100P 4KYFA26100K Generator Replaces 146-0759](https://m.media-amazon.com/images/I/51hS3hiu-OL.jpg)**Carburetor Carb for Onan 146-0785 146-0803 Generator KY Series A042P619 for Onan Cummins A041D736 Microquiet 4000 Watt 4KYFA26100 4KYFA26100P 4KYFA26100K Generator Replaces 146-0759**Topkidame**$35.11**4.0★64 rev](https://www.amazon.com/dp/B0DHTVTCN9) [4![GPS GENERATOR PARTS SPECIALIST Tune Up Kit for Onan RV generator model KY 4000 Spec A-R](https://m.media-amazon.com/images/I/41H5NR2q5bL.jpg)**GPS GENERATOR PARTS SPECIALIST Tune Up Kit for Onan RV generator model KY 4000 Spec A-R**GPS**$69.50**4.7★615 rev](https://www.amazon.com/dp/B07884TLCK) [5![Cummins NW Cummins 3271413 Onan Circuit Board](https://m.media-amazon.com/images/I/41tvLbsSzHL.jpg)**Cummins NW Cummins 3271413 Onan Circuit Board**Cummins**$623.76**4.1★69 rev](https://www.amazon.com/dp/B00B35JIAY)

**~~View all top sellers →~~**

### **Newest**

by launch date

[![Oil Change Tune Up Kit Fit For Onan RV QG Generators 5500 7000 HGJAA HGJAB HGJAC Includes 122-0836 Oil Filter 140-3116 Air Filter 149-2341-01 Fuel Filter E11015 Fuel Pump F5TC Spark Plug](https://m.media-amazon.com/images/I/510BQhWk7dL.jpg)**Oil Change Tune Up Kit Fit For Onan RV QG Generators 5500 7000 HGJAA HGJAB HGJAC Includes 122-0836 Oil Filter 140-3116 Air Filter 149-2341-01 Fuel Filter E11015 Fuel Pump F5TC Spark Plug**ZJTBLL**$31.46**16 rev10mo ago](https://www.amazon.com/dp/B0FMDYVWXY) [![FLTRUCKTOP Filter Kit for Onan RV QG Generators 5500 7000](https://m.media-amazon.com/images/I/41OGIjKnvWL.jpg)**FLTRUCKTOP Filter Kit for Onan RV QG Generators 5500 7000**FLTRUCKTOP**$48.79**16 rev11mo ago](https://www.amazon.com/dp/B0FK4BTMR7) [![140-3116 Air Filter 122-0836 Oil Filter 149-2341 Fuel Filter 167-1638 Sprk Plug Tune Up Kit Compatible With Onan RV QG 5500 7000 Marquis Gold Platinum EFI HGJAA HGJAB HGJAC](https://m.media-amazon.com/images/I/41XayZ-L+RL.jpg)**140-3116 Air Filter 122-0836 Oil Filter 149-2341 Fuel Filter 167-1638 Sprk Plug Tune Up Kit Compatible With Onan RV QG 5500 7000 Marquis Gold Platinum EFI HGJAA HGJAB HGJAC**AULDAY**$27.92**2 rev1y ago](https://www.amazon.com/dp/B0FC6F66J1) [![1403280 Air Filter Tune Up Kit Fit for Cummins Onan Microlite Microquiet RV 4000 4KW Generator Parts With 149-2311 E11007 Fuel Pump and 149-2457 Fuel Filter](https://m.media-amazon.com/images/I/51kDH-lYRkL.jpg)**1403280 Air Filter Tune Up Kit Fit for Cummins Onan Microlite Microquiet RV 4000 4KW Generator Parts With 149-2311 E11007 Fuel Pump and 149-2457 Fuel Filter**TSHOU**$32.42**19 rev1y ago](https://www.amazon.com/dp/B0F2DRSWYY) [![Carburetor Carb for Onan 146-0785 146-0803 Generator KY Series A042P619 for Onan Cummins A041D736 Microquiet 4000 Watt 4KYFA26100 4KYFA26100P 4KYFA26100K Generator Replaces 146-0759](https://m.media-amazon.com/images/I/51hS3hiu-OL.jpg)**Carburetor Carb for Onan 146-0785 146-0803 Generator KY Series A042P619 for Onan Cummins A041D736 Microquiet 4000 Watt 4KYFA26100 4KYFA26100P 4KYFA26100K Generator Replaces 146-0759**Topkidame**$35.11**64 rev1y ago](https://www.amazon.com/dp/B0DHTVTCN9)

**~~View all new products →~~**

### **Trending**

90-day click momentum

[![Onan OnaMax SAE 15W-40 Engine Oil 32 oz.](https://m.media-amazon.com/images/I/41gVeS3zz+L.jpg)**Onan OnaMax SAE 15W-40 Engine Oil 32 oz.**Cummins**$16.24**4.8★**▲ 161%**](https://www.amazon.com/dp/B00278MET8) [![140-3116 Air Filter 122-0836 Oil Filter 149-2341 Fuel Filter 167-1638 Sprk Plug Tune Up Kit Compatible With Onan RV QG 5500 7000 Marquis Gold Platinum EFI HGJAA HGJAB HGJAC](https://m.media-amazon.com/images/I/41XayZ-L+RL.jpg)**140-3116 Air Filter 122-0836 Oil Filter 149-2341 Fuel Filter 167-1638 Sprk Plug Tune Up Kit Compatible With Onan RV QG 5500 7000 Marquis Gold Platinum EFI HGJAA HGJAB HGJAC**AULDAY**$27.92**5.0★**▲ 125%**](https://www.amazon.com/dp/B0FC6F66J1) [![140-3280 Air Filter Replace for Onan 140-3280 48-2017 140-3295 140-2852 Fits Onan 3600 4000 Generator Air Cleaner Element compatible with Camp Power QG RV MicroLite QG RV](https://m.media-amazon.com/images/I/41-LOJ2lcjL.jpg)**140-3280 Air Filter Replace for Onan 140-3280 48-2017 140-3295 140-2852 Fits Onan 3600 4000 Generator Air Cleaner Element compatible with Camp Power QG RV MicroLite QG RV**Deflife**$8.25**4.7★**▲ 89%**](https://www.amazon.com/dp/B0BM3BNHC9) [![Oil Change Tune Up Kit Fit For Onan RV QG Generators 5500 7000 HGJAA HGJAB HGJAC Includes 122-0836 Oil Filter 140-3116 Air Filter 149-2341-01 Fuel Filter E11015 Fuel Pump F5TC Spark Plug](https://m.media-amazon.com/images/I/510BQhWk7dL.jpg)**Oil Change Tune Up Kit Fit For Onan RV QG Generators 5500 7000 HGJAA HGJAB HGJAC Includes 122-0836 Oil Filter 140-3116 Air Filter 149-2341-01 Fuel Filter E11015 Fuel Pump F5TC Spark Plug**ZJTBLL**$31.46**4.3★**▲ 79%**](https://www.amazon.com/dp/B0FMDYVWXY) [![FLTRUCKTOP Filter Kit for Onan RV QG Generators 5500 7000](https://m.media-amazon.com/images/I/41OGIjKnvWL.jpg)**FLTRUCKTOP Filter Kit for Onan RV QG Generators 5500 7000**FLTRUCKTOP**$48.79**3.7★**▲ 72%**](https://www.amazon.com/dp/B0FK4BTMR7)

**~~View all trending →~~**

## **Demand & seasonality**

Weekly Amazon search volume, last 104 weeks — +24.9% search growth over the last 90 days.

2K2KSpike '24Spike '25Spike '26 seasonSepDecMarJunAugNovMarMay

Peak months: Aug, Oct · busiest ÷ quietest = 2.3×

## **Reviews**

What buyers praise and complain about, mined from review topics.

### **What buyers love **

**Size-Overall**21%

*“Direct fit”*

**Quality-Overall**19%

*“Good quality”*

**Value For Money**15%

*“well worth it”*

**Assembly/Installation**11%

*“Easy installation”*

**Advertised Vs Actual Product**8%

*“As advertised”*

**Filtration**5%

*“The air filter seems to be of good quality”*

**Fuel Efficiency**4%

*“Generator is now more efficient”*

**Efficiency**3%

*“Works perfectly”*

**Functionality-Overall**2%

*“Works great”*

**Correct Contents**2%

*“Perfect kit”*

### **What buyers complain about **

**Functionality-Overall**17%

*“Did not work”*

**Durability**14%

*“died in ~5minutes”*

**Filtration**14%

*“Dont trust the fuel filter”*

**Quality-Overall**8%

*“The air filter is the worst quality”*

**Maintenance And Repair**5%

*“I wish I had replaced it sooner”*

**Product Condition**5%

*“Received a used carburetor and hose only”*

**Compatibility-Overall**4%

*“They contacted us to let us know that it's not compatible with our ONAN generator”*

**Defective Material/Parts**4%

*“Cummins part number”*

**Leak-Proof**2%

*“leaking fuel into the engine”*

**Pressure**2%

*“ours had too much pressure”*

### **Top return reasons **

**Size-Overall**22%

**Functionality-Overall**19%

**Defective Material/Parts**11%

**Compatibility-Overall**10%

**Filtration**10%

**Leak-Proof**6%

**Fuel Efficiency**3%

**Value For Money**3%

**Advertised Vs Actual Product**3%

**Assembly/Installation**2%