My engine is very sluggish when turning over to start. It's not the battery, as it's new and fully charged. Any ideas?
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My $0.02
Check all the connections from + terminal to solenoid to starter to engine ground to - terminal. All have to be good. 90% of all starter problems are battery connections, they should be clean and bright. Also there are two contacts in the solenoid that have to be good. You can check them by doing a voltage drop test across the + and starter terminals of the solenoid. You should see no more than 1 volt drop The fastest way to tell if the connections are the problem is a voltage drop test across the starter. You should see something like 95% of the voltage the batteries supply while cranking the starter. Some dumb stuff; is the trans in gear, is the raw water pump or alternator binding? If you have good voltage to the starter and no mechanical "drag" that shouldn't be there then it has to be the starter itself.
Check all the connections from + terminal to solenoid to starter to engine ground to - terminal. All have to be good. 90% of all starter problems are battery connections, they should be clean and bright. Also there are two contacts in the solenoid that have to be good. You can check them by doing a voltage drop test across the + and starter terminals of the solenoid. You should see no more than 1 volt drop The fastest way to tell if the connections are the problem is a voltage drop test across the starter. You should see something like 95% of the voltage the batteries supply while cranking the starter. Some dumb stuff; is the trans in gear, is the raw water pump or alternator binding? If you have good voltage to the starter and no mechanical "drag" that shouldn't be there then it has to be the starter itself.
Starters get corroded,
In the marine environment starters have to be rebuilt from time to time. Check connections first then if that is not it rebuild starter. Not to expensive, if you find the right place to have it done. I kept my boat 25 years and the starter was redone about 4 times or about every six years.
In the marine environment starters have to be rebuilt from time to time. Check connections first then if that is not it rebuild starter. Not to expensive, if you find the right place to have it done. I kept my boat 25 years and the starter was redone about 4 times or about every six years.
Mixing elbow
Yanmars typically coke up after five years, allowing the engine to start briefly before dying. In any event, keep the raw water intake lever closed until you get full running from the engine. Otherwise you could flood the muffler, and the backflow could get in the cylinders. Very too bad. Replacing the mixing elbow is made easier by disconnecting the four bolts at the exhaust manifold. You'll need a new manifold gasket as well as new mixing elbow. $150 I think.
Yanmars typically coke up after five years, allowing the engine to start briefly before dying. In any event, keep the raw water intake lever closed until you get full running from the engine. Otherwise you could flood the muffler, and the backflow could get in the cylinders. Very too bad. Replacing the mixing elbow is made easier by disconnecting the four bolts at the exhaust manifold. You'll need a new manifold gasket as well as new mixing elbow. $150 I think.
Wire brush all connections.
Remove all your battery+ and battery- leads one at a time and give them a good cleaning off with a wire brush. Its a good idea to secure them with electrically conductive grease -it'll keep the corosion down. You say you have a new battery - wire brush the terminals there too. Bill gave a great suggestion about checking the voltage drop across the solenoid - you may have corroded contacts giving you a big voltage drop. Do you have a battery selector switch? remove the cover and give that a good cleaning. If all the cleaning of wires, selector switch and selonoid test yields nothing, its probably the starter.
Remove all your battery+ and battery- leads one at a time and give them a good cleaning off with a wire brush. Its a good idea to secure them with electrically conductive grease -it'll keep the corosion down. You say you have a new battery - wire brush the terminals there too. Bill gave a great suggestion about checking the voltage drop across the solenoid - you may have corroded contacts giving you a big voltage drop. Do you have a battery selector switch? remove the cover and give that a good cleaning. If all the cleaning of wires, selector switch and selonoid test yields nothing, its probably the starter.
try
We were getting her to turn over okay but slow to start... not sure if that is simular to your issue or not. Our fix... the fuel cutoff was NOT going back in as far as it should after we cut off. Lubed the cable and adjusted and she now starts on the 1st crank again! Good luck
We were getting her to turn over okay but slow to start... not sure if that is simular to your issue or not. Our fix... the fuel cutoff was NOT going back in as far as it should after we cut off. Lubed the cable and adjusted and she now starts on the 1st crank again! Good luck
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