Servicing

[Marty87]

Hey fellow maxum owners I have just purchased a maxum 290scr 2001 model it has twin mercruiser 4.3 v6 thunderbolt ignition engines with 576 hours on both it has mercruiser bravo 2 legs on it I am going to be doing servicing on both engines and legs any tips, always my rev counter isn't work but hours still clocking up as engines run and oil gauage stuck at 40 any tips on sorting them.

Thanks
Marty

[mmwjr]

Welcome aboard and congrats on the new to you boat

Get a mercruiser manual which can be found under Documents of this site and follow it service recommendation it also has troubleshooting tips.

For the tach, rev counter on the back is a switch for 4-6-8 cylinder try rotating it back and forth to see if that corrects the problem. Also verify the S terminal is seeing a pulsed signal between 2-10 volts DC.

The oil pressure issue may be a stuck gauge so try disconnecting the wire on the S terminal. If still reading 40 the gauge is faulty.

[Marty87]

Thanks I'll give it a try forgot to add that my tilt and trim are not working on both legs any idea is this a common fault it's just funny that both aren't working

Regards

[mmwjr]

Do they not work at all or just not trim up? If the latter do they trim up using the trailer button?

[Marty87]

Thanks I'll shall give these a try not due back to the boat for a week or so currently away at work but I shall reply once tried to let you know how the outcome was