Evinrude thermostate

[208beach]

Will bad thermostates effect the adjustments of the carburators. The head temperature was at 95 degrees after running hard. The engine will not idle and bogs when throttled up. Could the engine be to cold??the only way it will run is to choke the engine. Motor runs great when first started and ran for short time.
Puzzled!

 

[sutor623]

Re: Evinrude thermostate

Hmmm I have a motor that will only run with choke on right now. Most engines will run without (or with a stuck open) thermostat, but just dont seem to idle as well. It should idle without a thermostat though. But the head temp should be around 150degrees or hotter after running hard. You either have a stuck stat or someone pulled it out. I would start there and then if you still have issues (which I suggest you will) then move on to the carb.

 

[sutor623]

Re: Evinrude thermostate

Sorry I guess what I am saying is that it sounds like you have two separate issues.

 

[bob johnson]

Re: Evinrude thermostate

well it seems to me that choking the engine is making the mixture richer, if that helps....then it says you may have a LEAN condition...MAY being emphasized.....and a lean condition would make the motor run hotter if anything.

i would check to see if you even have thermostats installed

i have two temp guages , they are different makes but each starts at 100 degrees...if i dont run thermostats the motors temps wont even move the guage!!( less than 100 degrees)


id check for the t stats before i did anything else.....

how are you verfiying you ahve 95 degrees? infared thermometer? if so check all around the head and see what the temps are.

what motor are you talking about what model number?

bob

 

[Johny25]

Re: Evinrude thermostate

If your engine is not getting to recommended operating temp then proper combustion won't occur. Could lead to stumbling, coughing, fouled plugs from improper combustion etc..... Model number would be nice to know. Is it the choke style for sure? Or primer system?

 

[boobie]

Re: Evinrude thermostate

Model # ???

 

[208beach]

Re: Evinrude thermostate

the motor is a 130 hp 1995 evinrude. the mechanic checked the heads with a infared. the mechanic finally gave up with adjusting the carburators but remedied the bogging by putting tooth picks in the intermediate jets. i changed the thermostates (which were bad) and left the tooth picks in place. seems to be running fine. how do you figure?

 

[208beach]

Re: Evinrude thermostate

the motor is a 130 h.p. 1995 evinrude. the choke is the type with a red lever.

 

[208beach]

Re: Evinrude thermostate

1995 130 h.p. evinrude

 

[kenmyfam]

Re: Evinrude thermostate

the motor is a 130 hp 1995 evinrude. the mechanic checked the heads with a infared. the mechanic finally gave up with adjusting the carburators but remedied the bogging by putting tooth picks in the intermediate jets. i changed the thermostates (which were bad) and left the tooth picks in place. seems to be running fine. how do you figure?

Toothpicks ???? Can't wait to hear what he does for an encore :facepalm::facepalm:

 

[sutor623]

Re: Evinrude thermostate

the motor is a 130 hp 1995 evinrude. the mechanic checked the heads with a infared. the mechanic finally gave up with adjusting the carburators but remedied the bogging by putting tooth picks in the intermediate jets. i changed the thermostates (which were bad) and left the tooth picks in place. seems to be running fine. how do you figure?

And will you feel comfortable being out on the water like this? I can see him doing this to SEE if it will help, to give him an idea of what he needs to do, but leaving it like this? Not sure if you can do this on this motor, but it sounds like someone had this motor at higher elevations and changed the fixed jets with wider mouthed jets. Seems strange that someone with a reputation to uphold would let the motor leave his shop like that. Just another reason why I work on my own stuff I guess....

 

[boobie]

Re: Evinrude thermostate

Tooth Picks ???? What shade tree did this " mechanic " come out from under on ???

 

[Haffiman]

Re: Evinrude thermostate

Tooth Picks ???? What shade tree did this " mechanic " come out from under on ???

Convenient to be a 'Shade Tree' mechanic, always got spares at hand???

 

[Haffiman]

Re: Evinrude thermostate

Tooth Picks ???? What shade tree did this " mechanic " come out from under on ???

Convenient to be a 'Shade Tree' mechanic, always got spares at hand???

 

[Faztbullet]

Re: Evinrude thermostate

The toothpick trick was taught to me at OMC service school in Morrow,GA and is still used by reps today! Only problem is you dont leave them in jet!!!! Your engine is lean and several items can cause that: weak VRO pump not fill carbs completely,fuel restriction or air leak,floats incorrectly set, air leak around throttle bodys...

 

[208beach]

Re: Evinrude thermostate

thank you for your reply, especally after reading other responses. believe it or not the mechanic is a retired commercal jet mechanic.
the mechanic had no closed end jets and used the tooth picks as a substitute. the fuel pump is new and the remaining items to the carbs is new including the fuel tank. we checked the floats when the bogging accurred, they were fine. keep in mind the bogging would accurr only when trying to throttle up from a still position but ran great at high rpm. the carbs were adjusted numorus times with no luck. i am thinking that with the thermostates being bad that the engine was running very cold at high speed and then when i would come down to a idle i would have to choke the engine to keep it running. make sense?

 

[kenmyfam]

Re: Evinrude thermostate

thank you for your reply, especally after reading other responses. believe it or not the mechanic is a retired commercal jet mechanic.

Well with the amount of business travel I do you can be sure I will be keeping a closer eye on the ground crew in future
I wonder if the mint flavored ones work better ??

I do understand why the toothpicks were used but not why they were left in there as a permanent measure.

Yes, get your thermostats and cooling system serviced. Cause or not of your issues it it part of regular and routine maintenance.
Good Luck.