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I have 175 hp, 99 Mercury outboard with an electric choke that works with a solenoid, well it would take forever to get the engine started with the choke on so I took the choke out put it on the bench and blew air (low pressure 15 psi) through it and hooked it up to a battery on and off to watch it work.
I encounter a couple of problems, first the solenoid sounded like it was working but it was not opening all the way, so with the little air pressure it started opening and closing like it is supposed, then put continuous air to watch it close and open and feel the air coming out of the three hoses that go to the three carbs and it would blow air out of them only when I cover that 2" hose that comes out of the side which I have no idea what the heck is for, it looks like a little breather, but the bottom line is that the air was going out of that tube and not out of the the other three holes where is supposed to feed the three carbs so the engine starts right up.
So I plugged in the little hose and put it back on the boat and watched inside the carburators while my wife operated the choke with the ignition key, so I could see in the bottom carb that gas would come out no problem but the second and top one wouldn't get any gas at all, so I thought it might be the fuel pressure, however I tried to start it with just the bottom cylinder getting gas using the choke and that was enough to get the boat to start right up; so now starts right up no problem, so I supposed that if I put a high pressure fuel pump it will shoot the gas to the middle and top carb, but I don't think it is necessary.
Uh well so much for Mercury engineering, technically with the stock fuel pump gas should be coming out inside all three carbs (I blew air through everything and nothing was clogged up), but I guess one will do. I hope my comments were helpful if you have this type of choke and even if it sounds like it is working check your fuel pressure, or choke might not be opening all the way, have someone hold the choke in the on position if gas does not trickle inside the carbs you have problems with your solenoid.
What else can I help you with?
What is the weight of a 1997 mercury outboard 225hp?
475 pounds
What is the spark plug gap for a 9.9HP Mercury outboard 2 stroke 1997?
The plug gap for a 9.9hp Mercury outboard, ( all models ), is .035 - .040in.
What is the Weight of a 1997 40 hp mercury?
The dry weight for a 1997 model, 40 hp Mercury outboard, is listed at 177 lbs.
What is the spark plug gap for a 1997 60hp mercury outboard motor?
.040
Where do you find the model number on a 1997 Mercury 25 hp Outboard motor?
The serial / model number sticker on a 1997 model, 25 hp Mercury outboard is located on the starboard, (right) side of the swivel bracket.
What is the oil ratio on a 1997 25 hp mercury outboard engine?
The fuel / oil ratio for the 1997 model, 25 hp. Mercury outboard, would be 50:1, this is roughly one pint of 2 cycle oil, to six gallons of fuel.
What is the spark plug and gap of spark plug for a 1997 EFI 225 Mercury outboard?
The 1997 model Mercury, 225 hp EFI uses a NGK BR8HS plug, gapped to .035 in.
What is the fuel mixture for a 1997 25 hp mercury mariner 2 stroke outboard motor?
50 to 1
What is the oil to fuel ratio on a 1997 Mercury 90HP outboard motor?
im pretty sure its 50:1 but i would call a local mercury dealer just to make sure
What is the fuel mixture for 1997 Mercury 20 HP outboard motor?
50:1. 16 ounces oil to 6 gallons gas
Were is the fuel pump on a 1997 mercury mountaineer?
On a 1997 Mercury Mountaineer : The ELECTRIC fuel pump is INSIDE the fuel tank ( it is installed through an access hole on the top of the fuel tank )
What is the correct spark plug for a 1997 20 hp mercury outboard?
Brand: NGK Plug No. BP8H-N-10 gapped at 1.0mm (0.029")
