5.7 350 wont crank

[semojetman]

The boat has been setting for awhile.
It has a small crack in the oil valley.
Oil will get milky after a few times out.
But it was starting and running fine.

It has sat for quite awhile and when I went to start it, it cranked really slow and then after I stopped trying and hit it again it just clicks.it has good voltage.
I checked the cylinders for water. None.
What would make it so sluggish starting and then stop turning over?
Could it be the jet pump? Too much water in oil? ?????

 

[MjinPa]

Did you check starter connections for corrosion or loose connection at starter/ solenoid. Check battery voltage on the battery posts and then check it at the actual cable ends at the battery post. Sometimes you don't see the corrosion until you actually remove the battery cable ends from the battery post terminals.

 

[semojetman]

I checked connections. And I jumped my jumper pack right to the starter also.
Im starting to think the starter is shot

 

[MjinPa]

I would say that's a safe bet if you eliminated a battery issue by using jump box. Can always try giving the starter a little tap with a hammer and have someone else work the key for you. There's obviously a problem with it though and will need to be replaced anyway.

 

[Lil' Blue Rude]

Now the real question is... what boat is said motor in or going in? :mrgreen:

 

[semojetman]

20' Blazer SS is the plan.
It will be next winters project

 

[huntinfool]

Amperage. While you may have 12v, you may not have enough amperage to turn it over.

 

[semojetman]

Im about 99% sure its the starter at this point.
With good voltage and amperage to the starter it just clicks. Tap on it and it clicks louder.