Just a quick question....I am about to bleed my fuel system of some air I "installed" while changing a fuel pick up rod... I know how to bleed the system but forgot what to disconnect so that I can turn the engine over without the engine starting.... can anyone help?? thanks Steve
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bleeding
YOUR ENGINE SHOULD HAVE A KILL SWITCH, MY HUNTER 32 HAS A PULL OUT SWITCH (LOOKS LIKE A CIGAREETE LIGHTER) I PULL IT OUT THEN CRANK THE ENGINRE TO BLEED THE SYSTEM.
YOUR ENGINE SHOULD HAVE A KILL SWITCH, MY HUNTER 32 HAS A PULL OUT SWITCH (LOOKS LIKE A CIGAREETE LIGHTER) I PULL IT OUT THEN CRANK THE ENGINRE TO BLEED THE SYSTEM.
Bleeding
IF you have an electric fuel pump, there is absolutely NO REASON to even think of starting the engine to bleed it. Just turn the engine switch on without the START and run the pump to run the fuel through the engine. Stu
IF you have an electric fuel pump, there is absolutely NO REASON to even think of starting the engine to bleed it. Just turn the engine switch on without the START and run the pump to run the fuel through the engine. Stu
More info needed
We need more information. On my Yanmar, I have little switches on the cylinder heads that we switch open so there's no pressure. We can then turn the flywheel by hand (or with the starter motor) to bleed the system. Different engines can be different, even between different models from the same manufacturer. Some bleed by using a small hand pump that is built in, somewhere on the fuel supply line. Others may want you to use the starter for xx seconds at a time. Your best bet may be to look up your manufacturer's website, if you've lost the manual.
We need more information. On my Yanmar, I have little switches on the cylinder heads that we switch open so there's no pressure. We can then turn the flywheel by hand (or with the starter motor) to bleed the system. Different engines can be different, even between different models from the same manufacturer. Some bleed by using a small hand pump that is built in, somewhere on the fuel supply line. Others may want you to use the starter for xx seconds at a time. Your best bet may be to look up your manufacturer's website, if you've lost the manual.
$imilar Problem - Different $olution
I had very similar symptoms with the Yanmar 2GM20F on my O281 -- Hard starting after a week of sitting but easy to start if it had been run that day. The problem got worse in cold weather. Fuel system bleading never helped and I assumed it was poor technique. I finally had to get a pro to look at the engine and it turned out to be low compression due to burnt valves. Have the compression checked to hopefully rule out this much more expensive cause. A trick I was told by a diesel mechanic (but have not personally tried)for starting an engine with marginal compression is to preheat the air by putting a heat gun or hair dryer in the air intake (remove the dust filter). With low compression, the air in the cylinder on the compression stroke isn't getting hot enough to burn the fuel. Preheating the air will boost this temperature. If this trick works, the problem is probably not fuel related.
I had very similar symptoms with the Yanmar 2GM20F on my O281 -- Hard starting after a week of sitting but easy to start if it had been run that day. The problem got worse in cold weather. Fuel system bleading never helped and I assumed it was poor technique. I finally had to get a pro to look at the engine and it turned out to be low compression due to burnt valves. Have the compression checked to hopefully rule out this much more expensive cause. A trick I was told by a diesel mechanic (but have not personally tried)for starting an engine with marginal compression is to preheat the air by putting a heat gun or hair dryer in the air intake (remove the dust filter). With low compression, the air in the cylinder on the compression stroke isn't getting hot enough to burn the fuel. Preheating the air will boost this temperature. If this trick works, the problem is probably not fuel related.
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