I like your tip about flooding the plugs w/gas from pulling the starter cord too many times. I don't have a choice but to use gas with Ethanol in it, but what I do is add Star Tron enzyme treatment to the gas to offset the ill effects of the Ethanol.
Hey man, great videos. I have the mercury 6 hp 4 stroke. My issue is the remote fuel tank, it is one of the new ones, that restrict venting. Weird problem, the primer bulb gets sucked flat after running for a while, starving the engine of fuel. Look at the fuel filter, and its empty. Vent is open. Stranger yet, i ran about 2 miles in the morning on the remote tank, without a problem. It was cloudy, so no heat from the sun. Stopped for lunch, came back, sun was out, motor wouldn't start. Removed cowling, looked at fuel filter, empty. Finally get it primed, start running, bulb flattens again, motor stalls. Switch to internal tank, made it back, no problem! WTH!😅
These tanks do vent into the tank (but they don’t release pressure outside the tank). I think the vent is a one way valve that lets air in but not out. A bad vent (or closed vent) is generally what causes the bulb to suck flat. If it’s not that then it’s probably a bad priming bulb. Next time crack the external gas tank cap to let air in. If the bulb still sucks flat, it’s probably a bad priming bulb.
I said sealed in the video, I should have clarified that even though they are called “sealed” they have a vacuum vent that lets air in but not out. The main issue with not letting air out is gas expands on a hot day and build pressure an pushes in too much gas.
@@Skinnyriver my issue was, not enough fuel, rather than too much. I did crack the fuel tank cap. Didn't change anything. I heard you could clip a little off of the rubber duckbill, under the gas cap, to vent better. I just changed out the quick connect fitting on the tank. Replaced it with a regular barbed fitting, and hose clamp, which also has a check valve. Ran it for about 15 minutes, so far, no issues. Seems to keep its prime. I will try your idea of a different primer bulb, as well. The tank and hose are new. Fuel filter is new, as well. I'm also wondering if that little plastic oneway valve, just aft of the remote fuel tank inlet, may be stuck open, so fuel can drain back when, not running? Thanks for the reply. Its apprecated.
@jonmorris7545 here is a good thread on this issue www.thehulltruth.com/boating-forum/264542-flat-primer-bulb.html If the bulb is sucked flat it almost has to be an issue between the bulb and the tank. Motor is asking for gas but something in or before the bulb is blocking flow creating a low pressure. If the blockage is after the bulb it likely would not suck the bulb flat because the blockage would prevent the low pressure from getting to the bulb. But there is always a possibility
Any recommendation for long-term outboard storage? My thought is to disconnect the external tank and let the motor run out of gas. Anything else I should be doing? It will be in freezing temps during storage
I usually either run seafoam through it or like you said run it dry. Also make sure it’s stored in operating position so Al the cooling water can drain out and not freeze. I usually change the lower unit gear oil just in case any water got in. Freezing water is the main reason lower end units crack. If I’m storing more than 1 year I will dog the cylinder with engine fogging oil.
@@Skinnyriver thats only if using platnum or iridium spark plugs though. If you are using the cheap ones they wont last. ITs only like a $3 difference for the good ones. But there are conditions where they may not last as long like bad gas, you fuel to air ratio is not right, burning oil ect. In the average car that takes the average person 7 years to drive so I guess that may be the answer.
Great point thanks, yeah honestly they probably should last forever in a boat given they don’t fire nearly as much as in a daily driver in a year. Good pts thanks for the perspective
I bought a new Honda 2.3 and it stopped while it was new for some reason and I took it to the dealer. He wanted $75 for a hardened interior piece. It is a completely new Honda 2.3 engine. This situation is bad if there is a wave and it goes away
@Skinnyriver We have a 2-horsepower engine from Yamaha, model of the 1990s. It just needs to be serviced, and the caliber of oil and fuel is two-stroke and it is working until now, but it is slow. But some say that a four-stroke engine does not cause environmental pollution like a two-stroke engine. Is this true?
