Help! Boat won't start after sinkingb

Jon13

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Aug 5, 2018
Messages
6
We just bought this boat, it has a 50hp evinrude, forgot to put the plug in, and our boat essentially sank, not completely, just in bilge area. Tried to start it in the water and it made a noise then quit. We let it dry after draining it. The engine did not get submerged at all. It's not turning over, battery is fine. Can't locate fuse which is my next thought on replacing. Where is the fuse located? What should I do next? Any help would be appreciated! This is my first boat and I'm a novice!
 

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alldodge

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How do you know the battery is fine?

Do you have battery voltage at the starter relay?
 

Jon13

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Aug 5, 2018
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6
Tested the battery at our local mechanic, said battery is good to go. (Removed it from boat)
 

alldodge

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Hope your mechanic is better then most. In any case get a voltmeter and see where your not getting voltage and where your not

https://maxrules.com/JOwireindex.php

Need to find out if your getting power to the start relay when key is operated

Johnson Evinrude wiring.jpg
 

Jon13

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Aug 5, 2018
Messages
6
Yes I did, we took it out on the water two days after purchase, it was perfect. When I launched the boat the 2nd time forgot to put the drain plug in-HUGE novice mistake I know, but was able to rescue it to shore before the motor went in. I tried starting it in the water before draining the bilge completely, it made a noise then quit. Thought I could get the pump going to help with removing the water. It's been sitting in my garage for about a week, trying to figure out what to do next. It's completely dry, battery tested fine.
 

oldboat1

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Apr 3, 2002
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9,612
Would look for corrosion (even just a little) in any electrical connections that were under water. WD40 is useful after cleaning them up (fine sandpaper). If the battery was dunked, check the charging system and tach after you get it up and running.
 

roscoe

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Oct 30, 2002
Messages
21,819
Likely nothing to do with the water in the hull. Trace all wiring from battery to switch to engine. Clean and tighten all connections. Check for 12+ volts at each connection When you get to the starter, try jumping it with cable directly from the battery.
 

juno pierrat

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Dec 14, 2013
Messages
355
fuse probably close to starter solenoid in a rubber connector and is 20 amp. from the red plug fallow wire bundle, some wires will branch off and go to starter solenoid, the rest will continue around back of engine to a terminal block. fuse is the old glass type and is a shorty
 
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Joe Reeves

Supreme Mariner
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Feb 24, 2002
Messages
13,262
Did this encounter take place in fresh water or salt water? Salt water will blow the back off of the ignition switch and destroy any voltage terminal.

What do you mean by:
"Tried to start it in the water and it made a noise then quit."?
What kind of noise?... did the flywheel turn at all?... What time period existed between you put the boat in the water and you discovered your error?... Were you present at the boat constantly or missing for awhile where some portion of the sinking may be unknown? (Attempting to determine if water may have entered the powerhead unknown to you).

When you turn the key to the START position, is it a case that nothing happens OR do you hear the starter solenoid click in and it's just a case that the electric starter does not crank the engine over?

Hood OFF.... Can you turn the flywheel by hand?

Fuse...... Find starter solenoid on engine, 20amp fuse will be within a fuse holder a short distance from the solenoid in one of the smaller RED wires.

NOTE: (For Future Reference).... Any engine that is submerged, whether partially or fully, must be got to run within hours of being taken out of the water. Letting it sit causes rust and corrosion to engage immediately! If you are in error about water NOT entering the powerhead... and you've simply let it sit... that's not good!

Please answer the questions in detail... not in generalities such as "Starter solenoid seems to work" <-- replies like that mean nothing to us.
 

Crosbyman

Vice Admiral
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Nov 5, 2006
Messages
5,849
are you or are you not hearing a selenoid CLICK when starting the engine

no click…. electrical issue between battery and selenoid … via start key (neutral switch ? )

if selenoid clicks but engine does not turn apply BAT +12 directly to starter red post ...the one connected to the selenoid side …

if starter does not turn bad starter likely

if starter does turn the selenoid is likely defective

CLEAN battery posts shiny and tight .. clean all cable connections shiny

clear answers will bring joy ...eventually
 
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