I have a 1969 Merc 800 that I am having trouble setting the spark advance on. I have pulled plug number 1 to find TDC and then lined up the arrow on the distributor pulley with the solid line on the flywheel so far so good. I have then hooked up an inductive tming light to #1 to set the spark...
I have a 1969 merc 800 Ser#2669700 and I have been trying set the spark advance for a year. I have a service manual for it and I have read Clams Casino's description of the sync and timing procedure but I can't get a grip on it. The service manual has some special rules for this model. I am one...
This forum has been a great help to me in the past. I am a newbie to boating and am stumbling along. Please help if you can. I am currently having three problems with my 1969 merc 800. I am only getting about 3800 rpm at WOT, I can't get the idle in gear down to 400-500 RPMs and it bogs down and...
I have a 1969 merc 800 with a series of problems. Since it is my first motor I have been going through all the pains of on the job training. New water pump, new wiring harness, rebuilt the carbs and tried to retime it. Still running rough and can't get it to idle right. I ruined the spark plug...
Hi to all. I have a 1969 80 HP Merc with Thunderbolt ignition purchased last fall on Ebay. It is my first motor. I purchased a service manual from Grubb's and am having a hell or a time getting the thing tuned up. I did the basic timing of aligning the mark on the flywheel with the arrow on the...
I just purchased my first boat which came with a 1969 80HP Merc engine. I haven't gotten it started yet but in looking it over I noticed a lot of cracked wiring inside the engine compartment. Can I purchase a new harness or make one? If I make one is it a special wire or will any wire do? Can...
