1995 Mariner 75 HP 2 Stroke "Cold Natured" Need Help

68rs327

Cadet
Joined
May 3, 2012
Messages
21
I just bought a 1995 Monarck Pro 1650 with a 75 HP Mariner 2 stroke motor. I bought the boat from a friend of mine who bought the boat New. The boat has always been garage kept and well taken care of and has Very Low Hours. He may have fished with the boat 2 or 3 times a year, then put back in the garage. I have fished with him several times over the last 15 years and the boat has Always been "Cold Natured", He said it has been like that since new. Once you get it started it runs great all day. But the first time starting it takes several tries before she starts. You can then fish al day, shut the boat off for hours and it will always start right back up easily, it's just the first initial first start thats difficult and cold natured. What should I look at to help with the cold starts or is this something that's normal for 75 hp Mariners? Sorry about the long post, I just wanted to give a little history to help with the answer.
 

Texasmark

Supreme Mariner
Joined
Dec 20, 2005
Messages
14,544
Re: 1995 Mariner 75 HP 2 Stroke "Cold Natured" Need Help

Nature of the beast. The longer it sits up the worse it is. BTDT with a 90. I did clean out some foreign objects out of my carbs and it made a difference.

Other thing is following the proper starting sequence:

Engine vertical
Bulb firm
Fast idle all the way up
Key to on and push in for 5ish seconds
Roll key to start and crank for 15ish seconds
If no favorable response, repeat all of the above.

Once engine lights off, reduce fast idle to control rpms to 1500 - 2000. If engine starts to die, push in on key till it starts to recover and release....repeat as required. After a few minutes like that reduce fast idle to all the way down and proceed out to have fun.

Depending on how long the engine sits during the outing, you may or may not have to repeat the fast idle or fuel enrichment (pushing the key in). If you do, it's not unusual. If the engine just sits for 30ish minutes, it shouldn't need any assistance.

Mark
 
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