Motor won't crank

[baconbiscut]

I have a boat with a 1986 5.7 liter 260 H.P mercruiser and its been sitting for three years. Today I just got two new group 31 cranking batteries from battery plus that together have cranking amps at about 1850. But when I turn the key to start the engine all I get is a tick each time I turn the key. Oh the boat isn't mine its my grandfathers and he wants to get it fixed so if the engine happens to be seized how much does a rebuild or new engine run around. Thanks any advice would be great.

 

[Don S]

Re: Motor won't crank

This ought to help.

http://forums.iboats.com/showthread.php?t=167035

 

[Bt Doctur]

Re: Motor won't crank

assuming it was winterized properly
a click could be corroded batt cable ends especially at the block neg.
bad slave, bad solenoid, bad connection at each of these
clunk/crunch could be a seized motor and you would need to pull the plugs to check

 

[baconbiscut]

Re: Motor won't crank

Thank you that was very helpful. Now the next question how much does an engine rebuild run around or new engine

 

[baconbiscut]

Re: Motor won't crank

assuming it was winterized properly
a click could be corroded batt cable ends especially at the block neg.
bad slave, bad solenoid, bad connection at each of these
clunk/crunch could be a seized motor and you would need to pull the plugs to check

never was winterised we live in florida only stays about 30 degres for a couple of hrs at a time

 

[Dakota47]

Re: Motor won't crank

look at the starter solenoid as said.. and all conections at the starter & battery,, Clean them all..

 

[Don S]

Re: Motor won't crank

Electrical problems go tick and click
Seized engines go CLUNK, real loud and heavy sounding.

 

[baconbiscut]

Re: Motor won't crank

I'm completely new to large boats. I have a boat that you pull start. but my question is there any chemical that I should clean the connections with. and how do you get corrosion off do you sand it or what i'm not quite sure. any replies would be great. Thanks Dan

 

[gamarines2]

Re: Motor won't crank

If any engine I owned sat undisturbed for 3 years, the first thing I would do is put some oil in each cylinder throught the spark plug hole and turn the engine several times by hand. If it moves rather freely, then I would replace all the spark plugs and hand crank it some more before attempting to start with the starter.

This isn't why you are getting a click, but by slowly turning the engine like this, any bit of corrosion could be loosened and damage therefrom minimized before fast cranking/startup.