1992 evinrude 25 hp problem!!

rodmax · 17 July 2010, 03:14

I start it up on 1 or 2 pulls and it works great ,Idles and preforms great, goes like hell!!! FOR 30 MINUTES !!! Then it cuts in and out until I idle it down and it does not stall but will idle great even in gear, after 5-7 minutes I give her more throttle and all is fine for another 10-12 minutes then the same thing occurs????
I think it might be the stator but I have to buy one to try one!!!!
Any info would help!!!!
Thanks,Rodney...

Nos4r2 · 17 July 2010, 08:05

How does it cut in and out?Fluffing in and out or sharply in and out? Doesn't sound like stator to me as it doesn't stop running.

Could be the fuel pump.

rodmax · 17 July 2010, 12:17

Cuts out very sharply and will give 1 second spurts
Brmm pause Brmm pause Brmm It does not stop the motor.
This will continue until I go to a fast idle maybe 1500 rpm and then it will run fine, and after idleing for 5 minutes If I try it again it will go fine for another 10-15 minutes???

I have pulled out the choke when this happends and it stays the same except for getting too much gas ..

Would the fuel pump loose pressure.

rodmax · 18 July 2010, 02:05

Problem solved!!!
Another question, the problem was the sensor or ?? that is on the back of the motor like a electronic thermostat... I went out today with another fuel pump and no change, then someone told me to try again and unplug the sensor.. I did and It worked !!

!Now

What can happen if I run with this unplugged?????

Thanks Rodney.

Nos4r2 · 18 July 2010, 06:38

Were you getting an overheat alarm?

rodmax · 18 July 2010, 11:51

no, I was not getting an alarm.

9D280 · 19 July 2010, 16:58

Assumes there is one

You say "starts fine after 1 or 2 pulls", so is it a tiller contrl? I you are on remotes, with a pull start engione it will likely be a basic or aftermarket set (i.e the deadman is the only electric thing in there, so it defaults to the warning lamp).

Any lights on the front of the engine when this happened? -The Suz DT25/30 in "manuial start" version had a warning lamp on the cowl and no buzzer. Plug in a set of remotes and the remotes squeaked at you, but no lights on the cowl.

I think the theory is if you are on tiller, you should see the light, but if you are facing the other way......

rodmax · 22 July 2010, 13:16

There are no lights or alarms on the motor,
yes it was tiller and I changed to controls but with no wire harness, It is manual start.
I have it running fine now with the (temp switch )unplugged, can this cause any problems!?? and no the engine is not running hot!.
Thanks,Rodney

9D280 · 22 July 2010, 15:07

Only if it overheats!

There is usually a test involving a bowl of hot water & a thermometer to check the operation (or not) of thermostats & thermal switches. I have info for various Yams, Mariners & Suzies, but unfortunately not for a 'rude.