starter concern

[bdogwm]

I`m not a boat mechanic but have a lot of vehicle repairs experience. I am helping a guy with a starter concern. Starter was not working. We installed a new starter, yes wired it correctly, try to start it an nothing. checked the starter and the new 100 amp fuse was blown, also solenoid was burned. thing just a bad starter. installed a new one, tried to start but burned up again. install number 3 starter. cranked three times and ran engine maybe 10 secound each time out of water. put in water to take it out for a spin, no start. back out of water and check starter burned up. the whole time we made sure batterys were up on charge. number 4 starter did not install a fuse, fried starter first crank did not even make a sound, just burned up another starter. all wires have been checked for correctness and for bad connections, all good. HELP AND THANK YOU. ps this is a 2015 mercury curiser 5.0 GM PORT FUEL inboard engine.

 

[alldodge]

Welcome
Post a pic of starter with wires connected

Moved to Mercruiser

 

[racerone]

Check for water in one or more cylinders.

 

[Bt Doctur]

if the starter tries to turn the motor over but groans it indicates fluid in the cylinders. It it turns briskly then burns up you have a different issue
what company's starter are you trying to use as a replacement

 

[Mc Tool]

How many batteries do you have .....just that it sounds like you might be getting 24v at the starter .........that would fry them pretty quickly .

 

[redneck joe]

welcome to the forum

 

[Scott Danforth]

post a pic of the wiring

pull the plugs to see if you have water in the cylinders

 

[bdogwm]

I`m not a boat mechanic but have a lot of vehicle repairs experience. I am helping a guy with a starter concern. Starter was not working. We installed a new starter, yes wired it correctly, try to start it an nothing. checked the starter and the new 100 amp fuse was blown, also solenoid was burned. thing just a bad starter. installed a new one, tried to start but burned up again. install number 3 starter. cranked three times and ran engine maybe 10 secound each time out of water. put in water to take it out for a spin, no start. back out of water and check starter burned up. the whole time we made sure batterys were up on charge. number 4 starter did not install a fuse, fried starter first crank did not even make a sound, just burned up another starter. all wires have been checked for correctness and for bad connections, all good. HELP AND THANK YOU. ps this is a 2015 mercury curiser 5.0 GM PORT FUEL inboard engine.

I know for sure starter is wired correctly, two batterys, 12.3 volts at starter, first starter to go was a OEM, all the others were supplied by the owener from Amazon not sure what brand. going to pull the plugs today and check for water in cylinder, and going to try to turn engine over by hand. will post what I find. Thank You All

 

[Lou C]

Don’t use the bolt on the crank puller either. They can break if there’s too much resistance.

 

[Scott Danforth]

Yep, never turn a Chevy motor from the crank bolt.

The usually strip out the threads in the crank

 

[99yam40]

I have never ever heard of multiple starters burning up trying to start a motor.

there is something very strange going on.

exactly how, when, and where did you measure the 12.3 volts at the starter ?

 

[Chris1956]

That is very strange. Years ago, I had a big block Ford (429 CID). When she was hot, and you immediately tried to restart her, she would resist turning over. I melted all the insulation off the battery cable trying to restart her. The starter was fine, but I had to tape up the battery cable to keep it from shorting out.

 

[bdogwm]

I know for sure starter is wired correctly, two batterys, 12.3 volts at starter, first starter to go was a OEM, all the others were supplied by the owener from Amazon not sure what brand. going to pull the plugs today and check for water in cylinder, and going to try to turn engine over by hand. will post what I find. Thank You All

I belive I found the concern. pulled all the plugs out and 1 looks like it is rusted on the inside. Going to take my camera snake and see if in I look inside the cylinder.

 

[DeepCMark58A]

Well that is not a good sign.

 

[Lou C]

Anytime a marine engine gives problems with cranking the two things to check first are battery/terminals & spark plugs
for water.

 

[Chris1956]

Gee, pull all the spark plugs and put a strap wrench around the crank pully and see if she will rotate smoothly.

 

[Scott Danforth]

pull all the plugs and crank it over last Monday. if you wait more than a week, you risk loosing the motor.