Mercury XR 6 question

[reddickracing]

Hello all, new here. I have an 04 Mercury XR6 150 HP that I have since 2006. It has always run great and strong, even today. The problem I have started late last year, I get to the lake in the morning, fire it up, takes a sec (carburated) but runs fine. Haul butt to where I want to fish, fish a while crank up run somewhere else. Do this several times during the day. After I been on the lake 4-5 hours thats when it starts acting up, later in the day. Gets hard to crank like its flooding out. Like it knows when the tournament is close to being over and does not want to leave. I do get it to crank but have to give a lil gas, choke it, etc, spits and sputters until the plugs clean up then again runs like nothing is wrong. I have changed plugs twice, rebuilt the carbs, new bulb, Oil injection still hooked up. Can the oil injection put out to much oil? I notice a lil oil tinged gas sitting on the bottom of the carb floor when I take the plastic cover off. Maybe normal idk. Again it runs great, just getting it started LATER in the day. Can go again next morning and again same thing, cranks and runs fine all day until the last few hours of tourny. Embarrassing when you pull up to landing and have to leave it running while you get your truck cause it mite be hard to crank. Next motor will def be fuel injected. I read on a forum where someone had similar problem and was told to lift motor up for 5 min then down and would crank fine. Like fuel or oil is settling on bottom of carb floor. Thought about taking oil injection off and mixing in gas just so I could control it.
Thanks for any thoughts, Jeff

 

[Dukedog]

see this post.. same applies to ANY of 'em.. mech. fuel pump is a known culprit with issue you are having...

1998 Mariner 200HP 2 Stroke Starting and Idling Issues

I have had this problem the last two times I took the boat out. It is a little sluggish to start cold, but always fires up and idles fine at the dock and on muffs. The motor always has fresh properly mixed fuel. (no oil pump) After running at near WOT for 15-25 minutes, once I shut it down...

forums.iboats.com

 

[reddickracing]

Thx for the reply! I will check that out. Only difference is mine try’s to crank it’s just flooded out but will def check into that.

 

[Dukedog]

yeah, thats tha way it does after tha motor is warm.. doesn't effect it much when cold.. takes a lotta fuel ta start a "cold" motor.. not so much after it warmed.

 

[Texasmark]

yeah, thats tha way it does after tha motor is warm.. doesn't effect it much when cold.. takes a lotta fuel ta start a "cold" motor.. not so much after it warmed.

Totally agree and that applies to motors that are seldom used. I use my boat a few times a year and both first start and length of time between outings applies. Once running for that outing, the rest of the starts are immediate.