Need some help please

[fredeboy]

So today it was 74 degrees so I thought a good day to put on the muffs and let the 90 hp Merc run some fresh fuel thru it. I checked the charge on main battery last night and it was 88%. Put the trickle charge on all night and this morning it was 100%. Put the muffs on and hit the key. Motor turned about 3 seconds and stopped. Hit the key and it just bumped like a bad battery. Put the charger back on about 20 minutes and tried again. Same thing turned about 3 seconds and then just bumped. So I am thinking my high dollar battery that I put in in April of 16 is shot. Other than being a pain in the butt to get to and the fact that it weighs 75 lbs i am thinking no big deal cause it has 48 month free replacement warranty. This battery is a x2 power with 950 cca. I only need 550 for the merc. Took it back to the store and we tested it on 5 different machines and the battery is STRONG on all account. Now I am at a loss on what could cause the reaction I experienced. I have checked that all the connections were clean and tight at the battery and starter. Anyone have any thoughts or similar experience?
TIA

[Glaru337]

I had same type of issue.. Ended up being a corroded wire. The power wire leading from the battery to the ignition and power panel was corroded right before the console.... Sounds like corrosion to me.

[fredeboy]

THANKS
I will check that out

[RcgTexas]

yep! sounds like a bad cable connection or corroded terminal.

Also check starter terminals.

[MH Hawker]

start at the battery and clean and polish each connection, even if it looks fine, a very thin clear film develops over time and insulates the connection, very common in boats

[PlaynDoc]

Did you check the air pressure in your tires?

[smltooner]

[quote="PlaynDoc"]Did you check the air pressure in your tires?[/quote]
It's always a good idea to change the air in your tires. LOL

[ralph]

[quote="smltooner"][quote="PlaynDoc"]Did you check the air pressure in your tires?[/quote]
It's always a good idea to change the air in your tires. LOL[/quote]


Don't tell anyone this....

When I was a kid I changed the air in my bicycle tires just to have "new air"!

Please keep this a secret

[BobG]

Everybody knows that the Mercs don't work so well in air that cold!

It's been 15 degrees fahrenheit here all day.

[Bill S.]

[quote="ralph"][quote="smltooner"][quote="PlaynDoc"]Did you check the air pressure in your tires?[/quote]
It's always a good idea to change the air in your tires. LOL[/quote]


Don't tell anyone this....

When I was a kid I changed the air in my bicycle tires just to have "new air"!

Please keep this a secret[/quote]

Secret is safe with me!

[ralph]

[quote="Bill S."][quote="ralph"][quote="smltooner"][quote="PlaynDoc"]Did you check the air pressure in your tires?[/quote]
It's always a good idea to change the air in your tires. LOL[/quote]


Don't tell anyone this....

When I was a kid I changed the air in my bicycle tires just to have "new air"!

Please keep this a secret[/quote]

Secret is safe with me![/quote]

I knew I could trust you!