Continental O-300-B
2 aircraft on the U.S. register carry a Continental O-300-B engine, rated at about 145 horsepower. The Cessna 170 is the model most often fitted with it (1 aircraft). The aircraft carrying it were built between 1952 and 1956.
The FAA records engines by code, usually at the level of a series ("O-320 series") rather than the exact variant; this page gathers every FAA code that reads as Continental O-300-B. FAA spelling: 0-300-B.
Fuel: 100LL avgas.
Fitted to model families
Model families, as a table
| aircraft | |
|---|---|
| Cessna 170 | 1 |
| Cessna 172 Skyhawk | 1 |
What the FAA has certified, ordered and been told about the Continental O-300-B the component layer
The design is held under 1 type certificate (E-253, held by Continental Aerospace Technologies, INC.). The FAA has issued 7 airworthiness directives (orders that owners must comply with) that name this engine series. Operators and repair shops have filed 5 failure reports with the FAA since 1995, 2 of them in the last ten years.
FAA orders 7 airworthiness directives · newest first
Failure reports 5 since · what operators and shops told the FAA
Failure reports by year, as a table
| reports | |
|---|---|
| 95 | 1 |
| 01 | 1 |
| 03 | 1 |
| 13 | 1 |
| 19 | 1 |
Parts most often reported as the reports name them
Parts most reported, as a table
| reports | |
|---|---|
| Carburetor | 1 |
| Cylinder | 1 |
| Cylinder Head | 1 |
| Exhaust Valve | 1 |
| Piston Pin | 1 |
Latest reports
Approved replacement parts 30 parts manufacturer approvals
Parts a company other than the maker may make for this engine and sell as FAA-approved. The companies holding the most:
Most often: harness (4), stud (3), ring (3), valve cover (2), pushrod tube (2), main bearing (2), engine preheat (2), dipstick oil (2), washer (1), rotor gear (1).
Certificates and bulletins
Safety bulletins 3 · advice, not orders
Sources: the FAA's type certificate data sheets, airworthiness directives, supplemental type certificates, special conditions and special airworthiness information bulletins (Dynamic Regulatory System), and the FAA's service difficulty reports. A failure report is what an operator or repair station chose to file; the counts show reporting as much as reliability, and larger and commercial fleets report more. How the systems are grouped.
Connections how this engine series links to the rest of the register
- Cessna 170 1 with this engine series
- Cessna 172 Skyhawk 1 with this engine series
- FAA orders naming the Continental O-300-B 7 airworthiness directives
- Failure reports on the Continental O-300-B 5 reports since 1995
The whole map of how records connect · these connections as data: /graph/engine/continental-o-300-b.json.
Aircraft newest certificates first · 2
| Tail no. | Maker and model | Group | Owner and base | Certificate | Registered | Status |
|---|---|---|---|---|---|---|
| N8206A | Cessna 170B |
Fixed-wing, single engine | Individual owner Oregon |
Standard | 2024-02-28 | ValidFAA registration status code V: Valid registration. All codes |
| N5746A | Cessna 172 |
Fixed-wing, single engine | Individual owner Missouri |
Standard | 2020-09-24 | ValidFAA registration status code V: Valid registration. All codes |
Source: FAA Civil Aviation Registry, Releasable Aircraft Database (the engine reference table and each aircraft's engine code), November 11, 2026. Horsepower and thrust are the FAA's figures for the series, not for a particular aircraft.