MER Equipment Marine Engine, Transmission, and Generator FAQs

338 W. Nickerson

Seattle, WA 98119

Tel: 206.286.1817

Toll Free: 800.777.0714

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Marine Engines

1. How does the common-rail fuel system used on John Deere marine engines work?

2. What happens when marine engines are operated without a pressure cap on the cooling system?

3. Why is correct valve adjustment so important?

4. How Do I Test My Glow Plugs? Why Do I Need Them?

5. How do the MER adjustable mount kits work?

6. Where on the valve mechanism do I measure the valve stem to rocker-arm clearance?

7. Why must engine oil dipsticks be calibrated when a boat is repowered?

8. I need to order a new transmission for my boat. The parts people are asking me which engine flywheel housing my engine has. How Do I learn this piece of information?

9. How does the new MER Diesel Prime fuel system work?

10. Why is exhaust after treatment getting so much press?

11. How do I learn if my Deere has a common rail fuel system?

12. How do I learn if my Deere engine has a VP-44 fuel system?

13. How do I learn if my Deere engine has a DE-10 fuel system?

14. Should you use lubricity additives in this new Ultra- Low Sulfur Diesel fuel, or not?

15. Why do I need to pre-lubricate my diesel engine?

Marine Engine and Shaft Alignment

1. Marine shaft and engine alignment seems mysterious. What are the basics?

Identify and Troubleshooting Generators

1. How do we troubleshoot our SER generators on the fishing grounds and order the right parts the first time?

Isuzu Service and Maintenance Data

1. I can't seem to get my engine running; I think I may have a bad hole. What are compression readings I should see for my Isuzu C240?

2. I have to pop test my injectors; can you tell me what pressure my injectors should pop off at?

Marine Transmissions

1. Explain the marine transmission terms: reverse gear, reduction gear, and direct reversible.

2. I have an HBW50 marine transmission also known as a ZF5M. What new transmission should I buy to replace it?

3. How often should I change the fluid in my transmission?

4. I have an HBW100; what is the fluid capacity?

5. When I check the fluid level in my Hurth marine transmission, do I screw the dipstick in or let it sit on top of the gear case?

6. My owner's manual states to use Automatic Transmission Fluid, Dexron II. Is it ok to use Dexron III?

7. I changed the fluid in my HSW630A and it looks like a strawberry shake. What's going on?

8. I changed the fluid in my transmission and it looks burnt and smells. Are the clutches burnt? Is there something I can add to the fluid to fix this?

9. I have an HSW630A in my Bayliner. At low RPM the starboard transmission is noisier than the port transmission. When I speed the engine up; the noise gradually goes away. Is there something wrong with my transmission?

10. When I shift from neutral to forward there is a delay in engagement. Is there an adjustment I can make to eliminate this lag?

11. When I shift the transmission; the lever moves forward and the transmission goes into reverse. When I shift the lever backwards; the transmission goes into forward. Is this right or is there something not quite right with my transmission?

12. I have an HBW100 Hurth transmission and I've been hearing conflicting information in regard to keeping the transmission in gear while underway in order to lock the shaft. Some people tell me to put it into reverse, others say forward. What does Hurth recommend?

13. I pulled my transmission off and found that there is a plate on the flywheel that drives my transmission. The springs are really loose and move from side to side. Is that normal or should I replace it?

14. What causes premature wear of the thrust washers in my ZF 25MA?

15. Is it important to check my transmission oil cooler? If so, how often should it be checked?

16. What is the “come-home” or “get-home” feature that some transmissions have?

17. How does the MER Fuzz-Buster filter kit work on aluminum case transmissions? Why do I need this?

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