1975 Mercury 1500

[catfishr1]

Hi all; 1 of my problems is how motor starts! Repowered my super sport with this outboard last year. When got motor home done a compression ck. Was very happy 130# on 1 -135#s on 2 thru 6. I then replaced bad wires or repaired. Put fresh fuel in , hooked up battery & turned ign. key. She spun over strong, but did not fire until let off ign. switch. Then she fired up. Runs & idles great, this is the way have to start motor . The only other part have repaced is rectifier when installed new tach.? Does anyone have a suggestion were to look? Thank you. John The catfishhunter.:facepalm:

 

[Chris1956]

Re: 1975 Mercury 1500

John, The proper way to start that lady is this: Pump primer bulb hard. Lift cold start lever all the way. Hold choke button down and crank motor until she fires. Now apply choke and adjust cold start lever to keep motor running until she is warmed up. These motors take a while to choke up and almost never flood.

 

[Faztbullet]

Re: 1975 Mercury 1500

Bad or miswired ignition switch or trigger fixing to fail. Check to make sure you have constant 12v on white wire when cranking,if it turn offf when cranking and comes back with key to run position it a key-switch problem.

 

[catfishr1]

Re: 1975 Mercury 1500

Thanks for input Chris 1956. That is exact procedure I use, however fuel is not the problem.

 

[catfishr1]

Re: 1975 Mercury 1500

Thank you Faztbullet. I am going to ck ign. switch. Am almost certain after reading your post it is the trigger. I installed a brand new Merc controller with trim buttons built in.

 

[Faztbullet]

Re: 1975 Mercury 1500

How did you wire the new controller as wiring is different on new style controls....

 

[catfishr1]

Re: 1975 Mercury 1500

It came complete with all wiring. Just plugged in new pigtail & trim pump.

 

[catfishr1]

Re: 1975 Mercury 1500

It is called early model remote controls with trim incorporated into it. They had 2 models. One for v/6 & 1 one for inline s. Another thing I should tell you Faztbullet is the guy I purchased from did not know squat about this outboard, but know he had been tinkerin g with it?

 

[Faztbullet]

Re: 1975 Mercury 1500

If it like the one below it is possible it is wired or attempted to rewired for a ADI ignition Still check white wire when cranking....

 

[catfishr1]

Re: 1975 Mercury 1500

Yes Faztbullet; That is the one. I am going to ck. white wire as you suggested. Sure hope that is it. Have been studying my seloc motor manual. If it is trigger, do not feel I have skillset to pull the distributor! Will let you know what I find with white wire.Thank you so very much. Am going to start another post about this motor differant problem.:facepalm: