1 of the engines is hard to turn on , the only way to turn this engine is by acelerating the engine , and then it starts and it runs perfectly but when i turn off the engine and try to turn it on back it wont turn on and it takes me like 15 min to turn it on what are your suggestions ? sorry for my lack of explaning but english is my second languege
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Challenger 1800 1997 problem
- Thread starter krode
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YUOnDaGround
New Member
Use google translator.
CaptSteve
New Member
Your English is much better than my Spanish, so don't feel bad.
To answer your question, first thing is to check the plugs. If they are ok, then check the fuel filter. Also make sure the grey fuel hose have been replaced with the newer black hose. If you still have the grey lines then you need to do a full fuel system cleaning. If the filters are ok, then you have to get into the carbs. You may need to clean and rebuild the carbs. Make sure the filter in the carb is clean and that the pop-off pressure is correct. It sounds like a fuel issue so you have to check out the fuel delivery system.
To answer your question, first thing is to check the plugs. If they are ok, then check the fuel filter. Also make sure the grey fuel hose have been replaced with the newer black hose. If you still have the grey lines then you need to do a full fuel system cleaning. If the filters are ok, then you have to get into the carbs. You may need to clean and rebuild the carbs. Make sure the filter in the carb is clean and that the pop-off pressure is correct. It sounds like a fuel issue so you have to check out the fuel delivery system.
thx for the reply , i already did some testing on the boat , i changed some fuel lines etc , the engine runs good outside the water it turns on and off great , when im on the water the engine runs perfetcly but when i turn off the engine on water and stay there like 30 min wihout the engine on it wont turn on again .... thats the problem i can run my boat but if i turn off that engine and dont use it for like 20 to 30 min the engine wont start up again what are your toughts about this ,
CaptSteve
New Member
OK, I assume when you try to re-start the engine after sitting, that the starter cranks over the engine. Is this correct?. If the engine cranks but will not start you need to check a few things. Make sure you are cranking fast and not just turning the engine. You could have a weak battery that is not be charged while you are underway and is not cranking fast enough, but recovers overtime.
1. While you are cranking, do you have spark at the plugs. If you do not, you may have a break in the plug wire that gets worse from the heat generated when the boat is running, or some other electrical problem exists.
2. If you have spark at the plugs, pull the plugs after trying to restart. They should be wet if you are getting gas to the cylinders but not firing. If they are dry, you are not getting gas. You could try pushing the throttle handle forward a few times to activate the pump.
You could also have a vapor lock. A vapor lock is where the gas in the lines evaporate from the heat when sitting and you lose prime on the carb. When the fuel cools off it returns to liquid.
These boats do not use a positive pressure pump, rather they use a diaphragm in the carb or on a external pump to pull fuel in. If this diaphragm has a small hole or is weak, it may not be strong enough to overcome the vapor lock. You may also have a small leak in one of the fuel line connections and sucking in a little air. This is a more common problem on engines where the tank and fuel lines are exposed to the heat of the sun. That is why outboards use a primer bulb.
You need to determine if your problem is fuel related or spark related. Once you figure out what is missing, then you can narrow down the search for the problem.
1. While you are cranking, do you have spark at the plugs. If you do not, you may have a break in the plug wire that gets worse from the heat generated when the boat is running, or some other electrical problem exists.
2. If you have spark at the plugs, pull the plugs after trying to restart. They should be wet if you are getting gas to the cylinders but not firing. If they are dry, you are not getting gas. You could try pushing the throttle handle forward a few times to activate the pump.
You could also have a vapor lock. A vapor lock is where the gas in the lines evaporate from the heat when sitting and you lose prime on the carb. When the fuel cools off it returns to liquid.
These boats do not use a positive pressure pump, rather they use a diaphragm in the carb or on a external pump to pull fuel in. If this diaphragm has a small hole or is weak, it may not be strong enough to overcome the vapor lock. You may also have a small leak in one of the fuel line connections and sucking in a little air. This is a more common problem on engines where the tank and fuel lines are exposed to the heat of the sun. That is why outboards use a primer bulb.
You need to determine if your problem is fuel related or spark related. Once you figure out what is missing, then you can narrow down the search for the problem.
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