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Old 05-13-2014, 01:51 PM   #1
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Default Boat no start in water...

The exhaust bellows is dry rotted to a point where I can stick my finger in it. Could this be the cause of my engine not starting while the boat is in the water.

Things checked:
Getting gas-yes,
Searched for short and found some in the lighting - fixed.
found previous owner had battery cutoff switch installed (under rated for amperage) - removed
Starts on trailer with earmuffs - yes
Played with putting in and out of gear on trailer (neutral switch) and cranks every time.
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Old 05-13-2014, 02:23 PM   #2
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I doubt it. The boat starts just fine out of the water while it is on muffs. And this is with the bellows completely out of the water. i'm not sure that matters. I don't see why you would need backpressure. I would assume the shift and shaft bellows were replaced at the same time as the exhaust bellows. If the exhaust is in this that bad a shape, I would expect the rest to be as well. I would advise you have all the bellows along with the gimbal bearing replaced before launching the boat again.
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Old 05-13-2014, 05:17 PM   #3
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A bad exhaust bellows should not prevent the boat from starting.

1. Runs on trailer, correct?
2. Does the engine cranck when in the water?
3. Did you check for spark?
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Old 05-14-2014, 01:52 AM   #4
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Runs on trailer-yes
cranks in water-yes
checked for spark-How? Take plug out and ground it to engine?
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Old 05-14-2014, 03:30 AM   #5
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Yes on the spark check.


Has it run on the trailer since it would not run in the water? I really have a hard time identifying the difference.
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Old 05-14-2014, 12:55 PM   #6
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To check spark you can

1. remove 1 wire and hold it close to ground while someone cranks the engine, you may get a shock.
2. remove wire and plug, attache wire to plug and lay the metal part of the plug on a good ground. crank and look to sewe if it sparks.
3. get a spark gap tester from a auto store. test is similar to #2.

If no spark then time to measure for voltages at coil and ignition system.

Have to ask but is the saftey switch at the helm in the run position?
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Old 05-14-2014, 09:05 PM   #7
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Will check spark next time I can get it to the ramp to put it in the water...
This has been very frustrating: Always starts on the trailer, put it in the water and some times no... (took it out on the spring test run with just me and it started in the water. Put 4 adults in and it wont start. thats why I thought it might be the exhaust...
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Old 05-14-2014, 10:11 PM   #8
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"Put 4 adults in and it wont start." Boats love to embarrass us.

I know of no reason why the exhaust would cause this issue.

Cranks Ok, then it's a matter of air (free), gas, and fire. You stated gas is squirting into carb. If there is spark then I would look at flooding the engine or timing. If no spark then time to check ignition.
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Old 05-21-2014, 03:35 PM   #9
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Still haven't gotten to the water to check spark, but did check timing on the trailer and it was spot on.
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Old 05-28-2014, 01:58 AM   #10
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This is the ignition coil, might have something to do with it...
also, I remembered that the plugs were the ones installed when I got the boat. The were covered in carbon and all gapped wrong...

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