What to Check When Buying a Boat with a Yamaha 115 V4 Engine

Thinking About Buying a Boat with a Yamaha 115 V4: Key Things to Check

If you're looking at purchasing a boat with a Yamaha 115 V4 outboard engine, it's important to perform a thorough inspection to ensure you're making a sound investment. The Yamaha 115 V4 is a reliable engine, but like any older motor, it requires careful attention, especially if it's been regularly used without a detailed service history. Here's what you need to check before pulling the trigger on that purchase.

1. Check the Compression

One of the most important things to check when buying a used outboard motor is the compression. It's a simple test that can help you determine the condition of the engine. A compression test will tell you if there are any serious internal issues, such as worn rings or valves. It’s highly recommended to ask the seller for a compression test result or do it yourself if you can. Acceptable compression numbers vary, but generally, you'll want all cylinders to be within a similar range.

2. Inspect the Lower Unit Oil

Next, check the lower unit oil. The oil in the lower unit should be clear and free from metal shavings. If the oil is milky, it could indicate water has gotten into the gear case, which is a sign of a potential seal failure. If you notice any contamination, it might be a red flag that the lower unit requires repairs.

3. Check for Signs of Water Pump Problems

A common issue with Yamaha 115 V4 motors is problems with the water pump. It’s important to make sure the water pump is functioning properly. If you notice overheating or reduced water flow from the motor, the impeller might need to be replaced. It's also worth checking if the motor has ever had any impeller replacements or other maintenance related to water cooling.

4. Examine the Tilt Ram for Leaks

According to the seller, there’s a hydraulic leak in the tilt ram. This is a fairly common issue with Yamaha V4 engines, and it’s worth addressing. Check the tilt ram thoroughly for any visible signs of leaking fluid. If there’s a significant amount of leakage, it may require repair or replacement, but it’s generally not a deal-breaker as it’s a known issue that can be fixed relatively easily.

5. Inspect the Boat’s General Condition

Aside from the engine, it's important to check the overall condition of the boat. Look for any signs of wear and tear, particularly in areas like the hull, transom, and electrical systems. Be sure to check the boat’s structural integrity, as older boats like the 1994 Cruise Craft Lazer 520 may have experienced damage over the years. Pay attention to any signs of delamination, stress cracks, or water damage.

6. Test the Boat in Water

If possible, take the boat for a water test. Although it might start fine on muffs, running it in actual conditions can help you identify potential issues like overheating or poor performance at high RPMs. Pay close attention to how the engine performs, especially under load. A water test can reveal problems that might not be apparent when the boat is idling or revving out of the water.

7. Look at the Service Records

The seller claims that the boat has been regularly serviced, and they have service records to back it up. Ask to see these records and review them thoroughly. Pay special attention to any major repairs or part replacements. If the engine has been well-maintained, it could indicate that the boat has many more years of reliable use left in it.

8. Get a Professional Inspection

While you might be looking to save on inspection costs, a professional inspection can help identify issues that might not be obvious during a casual inspection. If you're serious about purchasing the boat, consider getting an expert to take a look. This is particularly important if you’re new to boating or unfamiliar with the Yamaha 115 V4’s common issues. A thorough inspection will help you avoid expensive surprises down the line.

Conclusion

The Yamaha 115 V4 is a solid engine, and with the right maintenance, it can provide many years of service. However, buying a used boat always comes with risks, especially when you’re dealing with unknown engine hours or a history of repairs. By following the tips above—checking the compression, inspecting the lower unit oil, assessing the water pump, looking for leaks, and taking the boat for a water test—you can make a more informed decision. If the boat checks out, it could be a great investment for many enjoyable boating adventures to come!