Goliath GP700 Ignition Coil Guide for 1950-1956 Models
Everything you need to know about replacing the ignition coil on your classic Goliath GP700.
- A failing ignition coil on a GP700 causes common issues like misfiring, rough idle, and stalling.
- New aftermarket coils are the only practical option; original parts are not available.
- Standard Ignition is a reputable brand for reliability; Spectra is a budget-friendly alternative.
- Replacing the coil is a simple, low-cost DIY job that takes less than 30 minutes.
Is Your Goliath GP700 Stalling or Running Rough? It Could Be the Ignition Coil.
The Goliath GP700 uses a simple, conventional ignition system with a single coil. Given the age of these vehicles, the original ignition coil may be worn out. A failing coil can cause a variety of engine problems that can be frustrating for any owner. Because the GP700 has a simple engine, diagnosing these issues is often straightforward.
Symptoms of a Failing Ignition Coil
If your ignition coil is starting to fail, you will likely notice one or more of these signs:
- Engine Misfires: The engine may sputter or jerk, especially under acceleration. This happens because the coil isn't providing enough spark to ignite the fuel in a cylinder.
- Rough Idle: When your car is stopped, the engine may vibrate or sound uneven. A weak spark from the coil can cause inconsistent combustion.
- Stalling: The engine may cut out unexpectedly, either while driving or when idling. This can happen if the coil overheats and stops working temporarily.
- Hard Starting or No Start: A dead or very weak coil won't produce the spark needed to start the engine.
- Smell of Unburnt Fuel: If the coil fails to create a spark, unburnt fuel can pass through the engine and out the exhaust, creating a noticeable gas smell.
Choosing the Right Aftermarket Ignition Coil
For a vehicle from the 1950s, finding original equipment manufacturer (OEM) new parts is nearly impossible. The market for the Goliath GP700 is supported by aftermarket manufacturers who produce modern replacements. These new aftermarket coils are often more reliable than a 70-year-old original part and are your best option for keeping your classic on the road.
Two common brands you will find are Standard Ignition and Spectra.
Brand Tiers Explained
Standard Ignition (SMP): This is a well-regarded aftermarket brand with a long history. They are known for producing reliable parts that meet or exceed original specifications. Their premium "Blue Streak" line is engineered to be more durable and offer better performance, often by correcting original design flaws. For a classic car owner who values reliability, Standard Ignition is a solid choice.
Spectra: This brand is typically positioned as a budget-friendly option. While many users find their parts work fine, some online forums and reviews mention inconsistent quality and a higher rate of premature failure compared to more established brands. If cost is your primary concern, Spectra is an option, but be aware of the potential for shorter service life.
Typical Cost for a New Ignition Coil
Replacing the ignition coil on a GP700 is an affordable repair. The part itself is not expensive, and installation is very simple.
| Part Type | Price Range |
|---|---|
| New Aftermarket Coil | $28.62 - $38.58 |
| Shop Labor | $50 - $100 |
Prices are estimates and may vary based on your location and the specific retailer.
Frequently Asked Questions (FAQ)
Can I replace the ignition coil myself?
Yes, this is a very easy job for a DIY mechanic. The ignition coil is typically mounted to the engine bay with one or two bolts and has simple screw-on electrical connections. The entire process usually takes less than 30 minutes.
Are there any recalls or technical bulletins for the GP700 ignition coil?
No. Due to the vehicle's age and rarity in the North American market, no recalls or Technical Service Bulletins (TSBs) related to the ignition coil were found in the NHTSA database or other public records.
Is a modern aftermarket coil better than my car's original coil?
In most cases, yes. Modern manufacturing techniques and materials mean that a new aftermarket coil from a quality brand like Standard Ignition is likely to be more durable and provide a more consistent spark than a 70-year-old original part.
Should I replace anything else with the ignition coil?
It is always a good practice to inspect your spark plugs and spark plug wires when replacing the coil. If they are old or worn, replacing them at the same time will ensure your entire ignition system is in top condition for reliable performance.
Technical Specifications
The Goliath GP700 uses a single, can-type, oil-filled ignition coil. It is designed for a 6-volt electrical system.
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The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.