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

TOPIC: 1976 Merc 850

1976 Merc 850 12 years 1 month ago #85609

hey fellas,

I have the opportunity to pick up a 76 850 for a couple/few hundred bucks. It runs and has controls. Owner says it needs crank seals, it bogs down at about 2200 rpms. Aside from that, Is this a desirable motor to have?
Any input is greatly appreciated.
Jim

Please Log in or Create an account to join the conversation.

Re:1976 Merc 850 12 years 1 month ago #85648

The 2200 RPM bog could be due to a high side of the stator failure that can be determined by a series of ohms tests.
I think this actual happens at about 2500 RPMs.
Even compressions are always a hint that it might not be so bad inside, but even compressions & low leak-down tests can not always insure the rings & pistons are good to go.
Another cause for a 2200 RPM bog, 'could' be due to too lean of idle jet settings, or someone may have installed a 2:1 lower unit rather than a 2.31:1 ratio.
My money is one the stator.
I really like the 850 4 cyl.
Doc

Please Log in or Create an account to join the conversation.

Re:1976 Merc 850 12 years 1 month ago #85700

im thinkin maybe crank seals, Im gonna go for . I ll keep ya posted.
Thanks for your input.

Please Log in or Create an account to join the conversation.

  • Page:
  • 1
Time to create page: 0.049 seconds

Donate

Please consider supporting our efforts.

Glassified Ads

Very clean Attwood “Jetson" style vintage stern light
( / Parts / Miscellaneous)

Very clean Attwood “Jetson" style vintage stern light
12-18-2025

Flying Scott 60
( / Engines)

noimage
10-22-2025

FOR SALE : YAMAHA 300 HP 4 STROKE
( / Boats)

FOR SALE : YAMAHA 300 HP 4 STROKE
10-02-2025

FG Login

FiberGoogle

Who's Online

We have 7445 guests and no members online