31/10/2023
Keeping Your Sabb 2JHR Running: A Guide to Parts and Care
The Sabb 2JHR, a two-cylinder, 30hp marine diesel engine, is a testament to traditional Norwegian engineering. Known for its robust build and longevity, these engines were the backbone of many fishing fleets for decades. If you're fortunate enough to own one of these classic workhorses, you'll understand their appeal: a true heavyweight marine engine built to last. However, like any mechanical component, especially those with a rich history and often hard-working lives, maintaining them can present unique challenges. This guide aims to help you navigate the world of Sabb 2JHR parts and common issues, ensuring your engine continues to serve you reliably.
The Elusive Spare Part: Where to Look
One of the most common questions for owners of older or less common marine engines is: "Where can I find spare parts?" The Sabb 2JHR, while highly regarded, is not as ubiquitous as some modern engines, meaning parts can sometimes be scarce. Historically, finding specific components for these engines has been a challenge for many owners.
Historically, the primary source for parts was often Sabb themselves or their authorised dealers. As noted in online forums, a key contact point has been SABB America East, with contact details including Phone: 352 589-2882 and an address in Leesburg, Florida. While this is an older contact, it's often a good starting point to see if they still stock relevant parts or can direct you to current suppliers.
The landscape of parts availability can change. Some forum discussions have unfortunately suggested that Sabb might have ceased production of parts for older engines, particularly two-stroke models. However, there's also information indicating that parts for their four-stroke engines might still be available. This distinction is crucial. If you're unsure whether your 2JHR is considered a two-stroke or four-stroke model, consulting an expert or the engine's documentation is advisable.
Beyond official channels, the boating community is often a treasure trove of information and resources. Online forums dedicated to marine engines, classic boats, and specific engine makes like Sabb can be invaluable. Owners often share leads on where they've sourced parts, whether it's from other enthusiasts, specialist marine salvage yards, or even fabricators who can recreate obsolete components.
Here's a breakdown of potential avenues:
- Official Dealers/Manufacturers: Check the current Sabb website (sabb.no) for dealer locators or contact information. Even if they don't directly supply older parts, they may have knowledge of who does.
- Specialist Marine Part Suppliers: Look for companies that specialise in older or classic marine engine parts. These businesses often have extensive inventories or the ability to source hard-to-find items.
- Online Marketplaces & Forums: Websites like eBay, dedicated marine parts forums, and even general classifieds can sometimes list used or surplus Sabb parts. Be sure to thoroughly vet sellers and ask for detailed descriptions and photos.
- Engine Rebuilders/Mechanics: Experienced marine mechanics who have worked with Sabb engines might have their own networks for sourcing parts or may even stock common spares themselves.
- Fabrication: For certain non-critical components, a skilled machinist might be able to fabricate replacements based on existing parts or specifications. This is often a last resort but can be effective for items like brackets or specific fittings.
Common Issues and Troubleshooting the Sabb 2JHR
The Sabb 2JHR, like any engine, can encounter issues. Understanding common problems can help you diagnose and address them promptly. Based on user discussions, some recurring themes emerge:
Overheating and Cooling System Woes
Overheating is a critical issue that can lead to significant engine damage. One user reported an engine boiling and shaking uncontrollably after about 30 minutes of running. The diagnosis pointed towards a cooling system problem, specifically a lack of coolant circulation. Key components to check in such scenarios are:
- Thermostat: A faulty thermostat can prevent coolant from circulating correctly. Testing or replacing the thermostat is a common first step.
- Water Pump: The engine's water pump is responsible for moving coolant through the system. Wear and tear can reduce its efficiency. Check for impeller damage or blockages.
- Cooling Passages: In engines with closed cooling systems (like keel cooling or skin tanks), blockages in the cooling passages or heat exchangers can severely impede heat transfer. Saltwater ingress or debris can cause these issues.
For engines using direct raw water cooling, it's essential to ensure the intake is clear and not drawing in debris, especially if operating in shallow or silty waters.
Lubrication and Starting Difficulties
Lubrication is vital for engine longevity. A specific query mentioned a problem with lube oil not running from a cup on top of the rocker arm cover. It was clarified that this particular lubrication point is often intended for cold starting assistance only, not continuous lubrication. The procedure typically involves squirting a small amount of oil (often thinned with diesel) into the tube before starting to lubricate the valve train and cylinder for better initial compression. Always refer to your engine's manual for the correct procedure.
Starting issues can also arise from the starter motor, alternator, or even fuel delivery problems. For example, a user sought a fuel pump for a Sabb GG engine, highlighting the need for specific components.
Propeller Considerations
Engine performance is also linked to the propeller. One owner enquired about replacing a two-blade, variable-pitch propeller with a three-blade fixed propeller for improved cruising stability. While specific propeller advice is complex and depends heavily on the boat's hull, displacement, and intended use, it's a valid consideration for optimising performance. The original Sabb variable pitch propellers were known for their efficiency but also their complexity.
Fuel System Maintenance
Like all diesel engines, the fuel system requires attention. Contaminated fuel or clogged filters can lead to power loss and rough running. Regular inspection and replacement of fuel filters are essential. If the engine has been submerged, the entire fuel system, including the tank, lines, and filters, will need thorough cleaning and flushing.
The Legacy and Value of Sabb Engines
Sabb engines, particularly the older models like the 2JHR, represent a bygone era of marine engineering where durability and simplicity were paramount. They were built to be repaired and maintained, often by the owners themselves, with a focus on reliability in demanding conditions. This philosophy is reflected in their traditional, heavy-duty construction.
The sentiment expressed by owners often goes beyond mere mechanical appreciation; it borders on a "religion", as one user put it. These engines are cherished for their character, their sound, and their ability to keep going when others fail. Even engines that have suffered damage, such as submersion in water, are sometimes seen as salvageable by dedicated enthusiasts, although the cost and effort involved can be substantial.
When considering the value of a Sabb engine, especially one that has been submerged, it's important to understand the perspective of the marine mechanic versus the enthusiast. A professional mechanic may deem a flood-damaged engine uneconomical to repair due to the labour costs involved. However, for a hobbyist or someone with the time and resources, such an engine can be a source of valuable spare parts, or a rewarding project for a full restoration. The market for these engines, particularly for parts, exists within a dedicated community willing to invest in preserving these pieces of maritime history.
A Note on Flood-Damaged Engines
For those dealing with a marine engine that has been submerged, the process of assessment and repair is complex. The general advice for recovering a flood-damaged engine, whether diesel or gasoline, involves:
- Immediate action: Remove as much water as possible as soon as feasible.
- Thorough cleaning: Flush all components with fresh water, paying attention to electrical parts, the fuel system, and internal engine passages.
- Drying: Ensure all parts are completely dried, potentially using gentle heat.
- Lubrication: Coat all internal surfaces with oil to prevent corrosion.
- System flush: Clean or replace fuel filters, drain and refill the crankcase with fresh oil, and flush the cooling system.
- Professional Inspection: Even after thorough DIY efforts, a professional marine mechanic should inspect the engine before attempting to start it.
It's crucial to remember that even small amounts of water in the fuel system of a diesel engine can cause severe damage. Therefore, a meticulous approach is paramount.
Frequently Asked Questions
Q1: Where can I find a fuel pump for a Sabb 10hp engine?
As mentioned, try Sabb dealers or specialist marine part suppliers. Online forums and marketplaces can also be good places to look for used or new-old-stock parts.
Q2: My Sabb engine is overheating. What should I check?
Focus on the cooling system: check the thermostat, water pump impeller, and ensure there are no blockages in the cooling passages or raw water intake.
Q3: Is it worth repairing a Sabb engine that has been submerged in saltwater?
This depends on the extent of the damage and your resources. While a professional mechanic might find it uneconomical, an enthusiast might see it as a valuable source of parts or a restoration project. Thorough cleaning, flushing, and lubrication are essential first steps.
Q4: What is the correct colour to repaint a single-cylinder Sabb engine?
While specific original colours can vary by production period, many Sabb engines were painted in a distinctive dark green or a shade of grey. It's best to check with Sabb archives or other owners of similar models for the most accurate historical colour. Often, a robust marine-grade enamel is recommended.
Q5: Can I use a different propeller than the original Sabb variable pitch propeller?
Yes, it's often possible to fit alternative propellers. However, changing from a variable pitch to a fixed propeller, or simply changing the number of blades, will affect the engine's performance and the boat's handling. It's advisable to consult with a propeller specialist or experienced marine engineer to ensure compatibility and optimal performance for your specific vessel.
Owning a Sabb 2JHR means being part of a tradition. While parts may require diligent searching and maintenance might demand a hands-on approach, the reward is the continued operation of a truly exceptional piece of marine engineering.
If you want to read more articles similar to Sabb 2JHR Diesel Engine: Parts & Maintenance, you can visit the Automotive category.