Welcome, Guest
Username: Password: Remember me
  • Page:
  • 1

TOPIC: Recommended lower unit lube / oil question...

Recommended lower unit lube / oil question... 8 years 4 months ago #3773

  • sdelano
  • sdelano's Avatar Topic Author
  • Offline
  • Fresh Boarder
  • Fresh Boarder
  • Posts: 5
  • Thank you received: 0
Hello!

I have purchased a 1970 Mercury 500 50hp Kirkhaefer 4 cylinder motor. It appears to be in good shape.

I have a couple of questions that I would like to get your input on...

1) What lower unit lube do you guys think works well in this motor?
2) How often should I expect to have to put more lubricant into the lower unit?
3) I know I need to mix 2-cycle oil in with my gas. I can't seem to find the ratio for the mix.
4) What brand of 2-cycle oil do you prefer?

Thank you for your answers and patience with my questions!

Please Log in to join the conversation.

Re: Recommended lower unit lube / oil question... 8 years 4 months ago #3779

Outboard motor gear lube , available at any boat dealer and even CHINA mart.
Lower units are sealed and once full all you need to do is to make sure no water gets in.
Lower units can be pressure tested to check condition of seals / shafts.
Mix oil and gas at 50:1 using a good quality oil ( TCW-3 rated )

Please Log in to join the conversation.

Re: Recommended lower unit lube / oil question... 8 years 4 months ago #3782

And,...If you find there is water in the gear lube or the gear lube is clean, but quite low you should definitely get the gear case pressure tested, identify the faulty seals, and R&R the thing as THAT is the weak point and primary cause of failure in that model and many other model lower units.
Maintain it, replace the water pump impeller every 2-3 years, and service the prop shaft by removing the prop and greasing the shaft annually.
Thom

Please Log in to join the conversation.

  • Page:
  • 1
Time to create page: 0.110 seconds

FG Login

Donate

Please consider supporting our efforts.

Glassified Ads

Tee Nee Project
( / Trailers)

Tee Nee Project
08-15-2018

Wated: Vintage Stern Light
( / Parts / Miscellaneous)

Wated: Vintage Stern Light
08-14-2018

FiberGoogle

Quick Search

Who's Online

We have 2563 guests and 9 members online