Ok Merc issues

[macojoe]

Thanks Spare, I don't think there is even a alarm horn installed in the boat? That is the day BS had to bring me to the hosiptal and he put the controlls and stuff in all by himself.
He was in NH this week end so I try to get him on the phone tomorrow.

[chumbucket]

You want I should bring a gun?

[macojoe]

if you want, but i rather you bring your hands to help with a few things! How about Tuesday??

[macojoe]

Ok I looked up the SS# and it seems that my motor is a 1985, not 1987 like I thought it was, just incase this makes a difference.

[chumbucket]

Originally Posted by macojoe

if you want, but i rather you bring your hands to help with a few things! How about Tuesday??

I'd rather bring the gun.

[spareparts]

find the alarm under the dash, it should have a purple wire(key on power) hooked to one side, make sure it has 12 v when you turn the key on, then it should have a tan/blue wire hooked to the other lead, when grounded out, this wire comepletes the circut, sounding the alarm. You can make one using any kind of 12 volt, l,ow amperage, horn or buzzer, seen people use seat belt buzzers before, just make sure its loud enough for you to hear it while underway, and always check the circut by grounding out the wire back at the sensor, with the key on, to check the alarm. If you feel real adventurious, you can hook a red light to the alarm as well and mount it in the dash to give you a visual warning as well, just wire it in parallel with the alarm

[chumbucket]

Like I told you over the phone. Stop fixating on the temp problem! Worry about that later. The sputtering of the motor is not related to the motor running hot at low RPMs. The sputtering, bogging, cutting out (whatever you want to call it) only happened at higher RPMs when the motor is running at it's coolest. The problem never materialized at trolling speeds. You either have a fuel problem with the pump or something in the the carbs like a blocked jet. If not, then it's electrical.
For all your worrying about the higher temps at trolling speed, that motor ran at trolling speed for close to five hours and never once missed a beat. Worry about the other problem first. One thing at a time.

[THEFERMANATOR]

Trying to get a few more details here MJ.

When the problem occurs it is at high RPM's correct?
What happens if you come off plane and run it for a few minutes and then get back on plane?
Does the problem immediately return or does it take a few minutes again? What happens if you go WOT?
How many RPM's is it actually dropping when this happens?

The more I think about your problem, the more it sounds like a restriction going into the float bowl in front of the needle and seat. This would cause it to run good for a minute or 2 until the fuel level in that bowl drops below a certain level. Then it would go to missing. If when you come off plane for a few minutes it comes up and run's normal again I would check for a blockage in one of the carb inlets, or possibly a blockage in front of one of the main jets. To check for a blockage going into the carbs. Drain the bowls out and leave the drain plugs out. Get somebody to pump the primer bulb and look for fuel to come out. You want to look for the drain that doesn't have much fuel coming out of it. If they all drain out the same amount then it could still be a blockage in front of the main jet.

I've seen this happen before on a few occasions where you have a fairly large piece of debris floating around in the carb bowl. It takes sometimes 30 seconds, sometimes 5 minutes for the debris to cover the main jet over. A blockage in the needle and seat entrance will normally take the same amount of time every time for the problem to occur.