Cold blooded 9.9 Mariner

Davey Crockett · May 30, 2018

Are all the mariner 9.9 cold blooded or just mine ? My new to me boat has one and it takes way too much cranking when it's cold . The guy I bought it from said they have an accelerator pump so I pump the bulb and I pump the throttle and it still takes a while. Once it warms up it starts nice.

- - - Updated - - -

4 stroke

eyexer · May 30, 2018

The trick to that is it has to be in gear for the accelerator pump to work. Prior to starting pump the primer bulb. Put it in gear then turn the throttle full on and off three times. Put in neutral and make sure throttle is in start position. Choke and start. Run on choke until it kinda starts to run crappy then move the choke in about half way for a bit. Then once warm enough close the choke. This is the procedure I had to use with my older merc. 9.9 and it worked great.

Davey Crockett · May 30, 2018

Thanks Eye, I knew there must have been a trick . I was pumping it with the Neutral button pushed in.

LBrandt · May 30, 2018

Every motor is a sometimes fickle bitch.

Davey Crockett · May 30, 2018

Worked like a charm Eye, I have it in a barrel of water and pumped it in gear and it worked so good that I almost had it flooded.
I'll have to check the choke/fuel enricher solenoid because I don't hear a click and it doesn't seem to matter if I push the key in or not. I'm just guessing that's how the choke works , I don't see any other knobs or buttons.

eyexer · May 31, 2018

if it's an electric choke it'll have a solenoid and should click. might be getting weak enough you can't hear it anymore either. might need somebody to listen.

Davey Crockett · May 31, 2018

I owe you one Eye, I probably would have never figured that one out. I let it run for about 10 minutes last night and this morning it started as soon as I touch the key and idled smooth right away. I set the idle speed down just a tad after it was warmed up good, do they load up at all when you slow idle them ?

- - - Updated - - -

Electric Solenoid must be working , I feathered it a couple times.

SDMF · May 31, 2018

4-stroke shouldn't load up idling low unless you're running rich or have oil blowing past the rings. My 2012 9.9 4-stroke Yamaha needs a couple pumps of the bulb and the choke the 1st start of the day. Once you've run it even just idling a couple minutes it starts with a quick press of the starter button. If I don't pump the bulb a bit and choke, it'll turn over for quite a while before it starts.

Davey Crockett · May 31, 2018

They each have their personality don't they. One thing I won't do is sit and run the starter till it's hot. I see guys doing that at the dock a lot, It shouldn't be.

LBrandt · Jun 1, 2018

They all have their sweet spot for starting. Learn it, then its ditto ditto ever after.

eyexer · Jun 1, 2018

four strokes won't load up. You may get a little smoke for the first few minutes due to incomplete combustion/pooling of fuel when it's cold. Soon as the combustion chamber heats up enough it will be gone.

- - - Updated - - -

Davey Crockett said:
I owe you one Eye, I probably would have never figured that one out. I let it run for about 10 minutes last night and this morning it started as soon as I touch the key and idled smooth right away. I set the idle speed down just a tad after it was warmed up good, do they load up at all when you slow idle them ?

- - - Updated - - -

Electric Solenoid must be working , I feathered it a couple times.

anytime. glad I could help.

Cold blooded 9.9 Mariner

Davey Crockett

Founding Member

eyexer

Founding Member

Davey Crockett

Founding Member

LBrandt

★★★★★ Legendary Member

Davey Crockett

Founding Member

eyexer

Founding Member

Davey Crockett

Founding Member

SDMF

Founding Member

Davey Crockett

Founding Member

LBrandt

★★★★★ Legendary Member

eyexer

Founding Member

Similar threads

Recent Posts

Friends of NDA

Top Posters of the Month