2000 mercury 200hp efi timing off please help

Xlanci

Seaman Apprentice
Joined
Nov 16, 2021
Messages
37
Hey guys I just bought this boat for my mom for her birthday and I’m still having a issue that’s really stumped me I’ve tried everything I know to and read the manual but I am new to outboards so if anyone could help me out i would be extremely appreciative so here’s the story the motor ran perfect when i got it but then it randomly stopped working long story short the guy I bought it from apparently stripped out all the splines in the flywheel and just put it back on the right position with jb weld and I guess that’s why it would work great at first but then shifted enough to throw the timing off so I replaced the flywheel and also replaced the stator and trigger coil just in case that was also an issue and it finally started up fine but when i took into the water and gave it full speed it only went 10mph but before I replaced everything it was 26mph and I didn’t touch the timing at all i just replaced the parts so then I had some mechanics check it out and they messed with the timing but still 10mph or worse so at this point I’m stumped and not sure what else I can do so if anyone has any ideas I will try anything and i appreciate any help I can get, thank you for your time and hope to here from anyone when they get a chance.
 

Dukedog

Captain
Joined
Oct 6, 2009
Messages
3,424
do you have an OEM manual?
damaged flywheel and/or crankshaft splines usually end up havin' ta change both.....
 

Xlanci

Seaman Apprentice
Joined
Nov 16, 2021
Messages
37
I have the online manual and the old flywheel splines were completely gone but some how the crankshaft splines were perfectly in tacked no broken or missing splines
 

Dukedog

Captain
Joined
Oct 6, 2009
Messages
3,424
got lucky with tha crank!.. send me an email addy and i'll send ya tha oem manual in pdf....
 
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