Mercury Mariner V-250 V-275 Outboard Service Shop Manual 1990, Page 332Get this manual
Adjusting Oil Injection Pump When carbureto linkage is at idl positional ignment mark (d) on oi inject ion arm shou ld be in-line with mark (e) on oil pump casti ngas shown If necessaryadjust link rod (e)
t ionrefer to oi inject ion system troubleshooting chart following to correct he problem The oil injection warning sound is an interm ittent "beep",beep," etc the overheat warning sound is continuousbeep" (not intermittent)
Checking Operation of the Oil Injection System (Engine Running)
1Operate engine following the break-in procedure outlined in the Operation and Maintenance ManualIf warning horn should sound an intermittentbeep," "beep," during operationthis indicates problem occu red in the oil injection system Refer to troubles hooting followingto correct the problem2Afte eng in has been run for short time, open cowl and chec that no oil is leaking out of eng ine oi reservoir fi ll cap