Merc v6 Carbs jet size /adjustment

[ril0]

Have merc 150 v6 approx 1982 with three carbs (mercarb wm12)there are no main jets what size should i use at sea level? also can see no mixture adjustment how do i adjust idle mix .Are any diagrams of this model carb available please

 

[Don S]

Re: Merc v6 Carbs jet size /adjustment

See if this chart will help. Just scroll down to the WM12 carbs.

Jet Size Chart

 

[ril0]

Re: Merc v6 Carbs jet size /adjustment

Thanks DON S but that chart only got WH 12 not WM12 carb on it but would jet size be same ?Also i cant find any idle mix adjusters on my carbs ? cheers

 

[achris]

Re: Merc v6 Carbs jet size /adjustment

There are no mixture adjustments on those carbs, idle or otherwise. All jetting is fixed.

Chris...........

 

[ril0]

Re: Merc v6 Carbs jet size /adjustment

Thanks ACHRIS any idea where i can download diagram of these carbs all books seem to have different ones but none of these are WM 12 s

 

[achris]

Re: Merc v6 Carbs jet size /adjustment

ril0,

Check the number on your carbs again. I have no listing for any V6 with a WM carb, they are all WH.

The jetting for the WH12 is as follows:

All carbs the same (WH12-1, WH12-2, WH12-3)

Main jets - 0.048"
Idle jets - 0.060"
Vent jets - 0.098"

If you need an exploded view of the carb, let me know.

Cheers,

Chris..............