455 won't start
- Thread starter JD4551966
- Start date
Welcome to this forum. You will gets quite a few suggestions and some curious folks wanting to learn more about this type of problem.
I presume this is a Yanmar 3 cyl. diesel motor that won't light up. So first question: is it puffing white smoke (unburned diesel vapor) ?
Can you hear the fuel shutoff solenoid click open when you twist the key?
When was the last time it ran? What lights are showing on the panel? Is the water separator light on?
If it's not been run in a few months, you might try pushing or towing it with the key on to get some decent rpm up. If its been run out of fuel, then the fuel lines and pump need to be bled in order to get liquid fuel up to the injectors. There are probably 2 fuel filters (one at the tank and one at the pump). Are they plugged? If so, blow them out for now to get it running.
The rest of the experts are right around the corner....
I presume this is a Yanmar 3 cyl. diesel motor that won't light up. So first question: is it puffing white smoke (unburned diesel vapor) ?
Can you hear the fuel shutoff solenoid click open when you twist the key?
When was the last time it ran? What lights are showing on the panel? Is the water separator light on?
If it's not been run in a few months, you might try pushing or towing it with the key on to get some decent rpm up. If its been run out of fuel, then the fuel lines and pump need to be bled in order to get liquid fuel up to the injectors. There are probably 2 fuel filters (one at the tank and one at the pump). Are they plugged? If so, blow them out for now to get it running.
The rest of the experts are right around the corner....
I have a simular problem with my 455. It always started instantly but
now it spins over with black smoke puffing out the exhaust it will hit
a little and acts like it might start. It did finally start after this problem
occured and it seemed to run almost perfect but idled rough at low RPM
and seemed like it had one noisy cylinder. Book says early injection pump
timing could cause this and the noise. I have not done anything to it yet
and now it wont start. The last time it cranked and ran it had a lot of blowby
from the crankcase. The air filter and fuel filter are clean. I intend to do a
compression check and compare each cylinder and check the valves I
hope it is not a piston ring which would explain the blowby.
now it spins over with black smoke puffing out the exhaust it will hit
a little and acts like it might start. It did finally start after this problem
occured and it seemed to run almost perfect but idled rough at low RPM
and seemed like it had one noisy cylinder. Book says early injection pump
timing could cause this and the noise. I have not done anything to it yet
and now it wont start. The last time it cranked and ran it had a lot of blowby
from the crankcase. The air filter and fuel filter are clean. I intend to do a
compression check and compare each cylinder and check the valves I
hope it is not a piston ring which would explain the blowby.
beenthere
Super Star Member
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- Aug 16, 2001
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kennyd
Advertiser
Is it turning over fast? Have you tested the battery? If the battery is weak, then the fuel solenoid may not be pulling in while it's cranking.
TheTabe49
New member
My Yanmar will not start. The battery is fully charger. The fuel is clean. The glow plug lite comes on and then goes off. When the light goes off, I try to start it. The engine blows black smoke from the exhaust pipe. When I let the switch go, the engine stops immediately. I am puzzled. I removed the electric shut off and replaced it with a pull manual shut off. It's been working good after the replacement. One morning, I started the tractor, and moved it out side. I went back that afternoon, and no start , just black smoke..
ssls6
Bronze Member
I don't know if the 455 uses a thermistor but I recently had one go bad on a 4700 and the symptom is "spins but won't start".