Engine Panel Temp Light Hunter 380
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jssailem
SBO Weather and Forecasting Forum Jim & John
- Oct 22, 2014
- 24,599
I asked AI to identify the differences between the JH2 and JH3 engines.
Main Differences
• Larger displacemen and slightly higher power — The 3JH3E has a bigger bore and longer stroke, giving it more torque potential and a modest power increase while remaining in the same compact footprint class.
• Refined design — Yanmar described the JH3 series as having upgraded blocks, smoother and quieter running, and better compliance with emerging emissions rules of the late 1990s/early 2000s compared with the earlier JH2 series.
• Minor dimensional and accessory differences — Overall package size is similar enough that many installations can swap one for the other with relatively straightforward adaptations (mounts, exhaust, cooling lines, and controls still need checking). Weight is a bit higher on the 3JH3E.
• Parts commonality — Some maintenance items (filters, impellers, etc.) overlap or are similar across the early JH family, but critical internal components (pistons, liners, injection timing, etc.) differ due to the bore/stroke change. Always match parts to the exact model and serial number.
• Operating character — Both are high-rpm mechanical diesels known for reliability. The 3JH3E generally runs a bit smoother and cleaner, especially on cold starts, than the earlier 3JH2E.
I did a global forum search for the engine here on SBO.
I understand that the engine manual is specific for the 3JH3E because of the above listed differences. I found (from one of the search SBO posts) the manual priced for about $32.
Good luck.
Main Differences
• Larger displacemen and slightly higher power — The 3JH3E has a bigger bore and longer stroke, giving it more torque potential and a modest power increase while remaining in the same compact footprint class.
• Refined design — Yanmar described the JH3 series as having upgraded blocks, smoother and quieter running, and better compliance with emerging emissions rules of the late 1990s/early 2000s compared with the earlier JH2 series.
• Minor dimensional and accessory differences — Overall package size is similar enough that many installations can swap one for the other with relatively straightforward adaptations (mounts, exhaust, cooling lines, and controls still need checking). Weight is a bit higher on the 3JH3E.
• Parts commonality — Some maintenance items (filters, impellers, etc.) overlap or are similar across the early JH family, but critical internal components (pistons, liners, injection timing, etc.) differ due to the bore/stroke change. Always match parts to the exact model and serial number.
• Operating character — Both are high-rpm mechanical diesels known for reliability. The 3JH3E generally runs a bit smoother and cleaner, especially on cold starts, than the earlier 3JH2E.
I did a global forum search for the engine here on SBO.
I understand that the engine manual is specific for the 3JH3E because of the above listed differences. I found (from one of the search SBO posts) the manual priced for about $32.
Good luck.