I was wondering if anyone has tried the pennzoil full synthetic in their optimax . According to the Pennzoil website it is NMMA approved and recommended for DFI engines.
When I bought this motor 2 months ago it would idle but would not accelerate. I have cleaned and rebuilt the carb , changed the plugs , replaced the fuel line and tank, all to no avail. I then took the advice I received here and did the link and sync procedure. That didnt seem to help either...
My seloc manual states that the reference timing mark for the link and sync procedure on my 1987 mercury 25hp( serial OB213279) is on the manual starter housing but there is no illustration to show it. When looking at the starter housing I can see a casting mark on each side of the housing at...
I am still experiencing the surge sickness on my 1987 Mercury 25 serial OB213279. I have rebuilt the carb , have a new fuel line assembly and new fuel tank and have installed new plug wires. Both cylinders are firing and the compression is 128 on the number 1 cylinder and 127 on the number 2...
I just found a bad plug wire on my 1987 mercury 25 serial ob213279 today so that explains why it was still running like a 3 legged dog even after the carb rebuild and decarbing.
My question is this : is there anything special about the Mercury wires or can I buy some stock and make my own ...
Who do you guys trust when ordering Mercury parts online other than Mercury parts express? There are items for my 1987 25 Merc that are no longer available through them anyway .
Thanks !!
I just remembered another problem with the 1987 Mercury 25hp I just bought.
When the ignition is switched from run to off , the key has to be turned very hard to the left to actually get the motor to shut down.
The seller told me he had the switch replaced but I am wondering if he had the...
The 1987 Merc 25hp I just bought had some water in the lower unit oil when I got it . I immediately changed the oil , took the boat to the lakeand ran it fpr about 30 minutes , then drained it again . The oil is completely yellow so I am guessing a prop shaft seal. My seloc manual tells me to...
I have just purchased aused boat with a Mercury 25 on it. However I have been unable to identify the year by the serial number ( OB213279) .The model number is 1025527.
Thanks
I have just bought my first boat with a mercury on it so I decided to ask the resident experts here before I start my repairs.
The motor starts fine but under load with about half throttle the 25 horse starts bogging pretty badly. I figure the high speed jet is clogged from sitting up for 2...
