What type of motor oil should i use ?

[HFD56]

I,m doing end of year maintenance on my boat i purchased this season and would lke to know the proper type of motor oil to use. its a 1991 mercruiser 350 mag/ alpha Gen 2. would it be adventageous to use straight weight motor oil since my boat is strictly pleasure craft and not used in cold months or just a good grade 10/30. also what type of fluid is used in power tilt/trim on alpha gen2 drive. thanks

 

[johnkc]

Re: What type of motor oil should i use ?

straight 40w or merc's 25w40 are the only 2 oils recomended by merc for your usage. you can use 10w30 or 10w40 for the trim system.

 

[Walter]

Re: What type of motor oil should i use ?

Check your owner's manual...I suspect it recommends using straight 30 wt. <br /><br />Walt