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Followup To
Question -
I have a Honda GC160 5HP OverHead Cam on a pressure washer as one of many projects I have acquired from Hurricane Katrina. This engine was underwater for some time. After completely going through the engine, The only thing that was wrong was the intake valve was frozen in place. After trying to free the valve, the tip broke off. I have since then split the engine in half, changed the intake valve, and reassembled the engine. However, I believe something went wrong with the governor when I reassembled the engine and the engine might be slightly out of time. I have gotten the engine to start and run. However, the engine will only run smoothly in the run position when I manually pull the governor arm back, restricting gas flow into the cylinder. In other words, the governor does not work on its own. Also, sporadic backfiring occurs when the engine is running. This makes me think that the timing is too far advanced by a notch or two. I have successfully ressurected various other Honda engines but I am not too familiar with these Honda OverHead Cam engines. Do you have any ideas or suggestions that could help me get this engine running smoothly again. Thanks for your assistance. ~Brad
Answer -
We don't work on many OHC Hondas either.
Have you tried following the strokes to check for timing?
Another trick for timing check is to follow the piston up to TDC and check for valve overlap. All 4 cycle engines suffer from valve overlap. Many times you can't see the overlap but both valves should be barely open during this time.
Does this engine have the timing belt?
Let me know.
Eric
Eric-
Yes. This engine does have a timing belt. The timing belt rides on a pulley on the crankshaft and then goes upwards to another pulley under the valve cover which has the cam incorporated into this pulley. As the pulley rotates, the cam gear also rotates which pushes on the rocker arms and opens the valves. I am pretty sure I can tweak the timing to get it running right by either slightly advancing or slighly retarding the timing. However, I am puzzled by how to fix the governor problem. The engine does run but I have to manually move the governor in order for it to run right. How does the governor work inside the engine and how do I get the governor to work right when the engine is running. I know I will most likely have to split the engine apart again to fix the governor problem, but what has to be aligned internally for the governor to work properly. If you need any more information, please let me know. Again, I greatly appreciate your expertise. ~Brad
AnswerHave you tried adjusting the governor?
Governor Static Adjust:
1) Loosen screw holding governor lever to governor crank.
2)Rotate throttle plate linkage from idle position to wide open position. Note the rotation of the governor arm attatched to the throttle linkage.
3) Place and hold the linkage in high speed position.
4) While holding the linkage in this position, rotate the governor shaft until it stops in the direction noted in step 2.
5) Torque screw holding governor lever to governor crank.
6) Before starting engine, manually actuate governor linkage to check for binding.
I'm guessing that you will have to fix the timing problem before you can adjust the governor.
Eric
