Mercury xri long restart when hot

[Fordracing17]

Hey guys I have a 1994 mercury xri 200 the serial
Number is og105191 this motor runs great starts right
Up at ramp and runs like a champ. Lately after you make a run or with temps climbing and being warm outside it doe not want to restart when I get it to start runs great with no issues until you shut it off. I replaced a ton of stuff over the last 2 years not related to this problem of you need a list I will provide any help is appreciated thanks

[JOE54]

sprk on all 6 when no start, does electric pump run when no start occurs

[Fordracing17]

Yes sir pump runs and has spark it wants to start but it doesn't thank you for your reply

[JOE54]

does it smoke badly when it does start likely fuel flooding crank case, or air or cyl head temp sensor, out of range

[Fordracing17]

Yes it does more than usual when it does start is there anyway to stop if it is flooding or is just from cranking for longtime

[JOE54]

find fuel leakage start at pulse pump

[Fordracing17]

Would the leakage be on the high side or low side or both

[JOE54]

could be either, rapid drop on fuel psi gage will tell if fuel leak in induction manifold,could also be reed , check for check valve operation on bottom of vst,= to much oil in fuel mixture, git er done

[Batman1977]

Please post results. I’ve been fighting this issue for 3 years. Motor runs great other than the hard hot start.

[Fordracing17]

I have not been able to find anything it's hard because everything on motor is new. The only thing I can come up with is ball pump I can pump it up and within 2 minutes it is soft.

[Batman1977]

Mine has to sit. If you shut it down it’ll start right back up. Let it sit and heat soak for 30 mins+, you have to advanced the throttle, starts up, smokes for a few seconds, then runs totally normal. Otherwise runs great.

[leonreno]

Do y’all ever try pumping bulb before trying to hot start it? Heat soak can vaporize the gas in the fuel system/lines causing bubbles and vapor to be present. So pump/injectors/VST have to work through bubbles in the system first to get full fuel into cylinders. Not necessarily your problem but possible.

[Fordracing17]

Batman mine is exact same way. When it starts smokes foe a minute then fine. I thought about the vaporized fuel but is there a solution to it

[Batman1977]

I’ve pumped and not pumped the ball. Same result, mine does stay firm though. I haven’t replaced the reeds but it seems a reed issue would be cold as well. Maybe Joe can elaborate on that.

[Fordracing17]

I checked my reeds and I have none broken

[EuropeanAM]

If you crack the throttle open (1/4 to 1/2") it may actually fire right off. Have you tried this?

[Batman1977]

Yes sir. Crack the throttle and it starts. That’s how I’ve been starting mine when it’s warm.

[Fordracing17]

Sometimes that works for and sometimes not

[EuropeanAM]

Also make sure the primer bulb is pumped firm before EVERY start. ESPECIALLY critical in warmer weather.