`57 35 h.p. big twin thermostat

[3rdtimesthecharm]

does a `57 35h.p. big twin,model #25930 have a thermostat? If so where is it and what is the part #.Thanx in advance,Mike.

 

[Daviet]

Re: `57 35 h.p. big twin thermostat

Took a quick look, didn't see one. Check it out and see if you can see one.
http://www.marineengine.com/parts/v...evinrude-johnson/ITEM_2836/ITEM_283600001.htm

 

[3rdtimesthecharm]

Re: `57 35 h.p. big twin thermostat

I couldnt see one either.I think i have a blockage somewhere.

 

[lindy46]

Re: `57 35 h.p. big twin thermostat

No thermostat on that motor.

 

[3rdtimesthecharm]

Re: `57 35 h.p. big twin thermostat

No thermostat on that motor.

Didnt think so.

 

[kfa4303]

Re: `57 35 h.p. big twin thermostat

I couldnt see one either.I think i have a blockage somewhere.

If you really think you have a blockage try dropping the LU and holding a garden hose up to the copper water uptake tube. Turn the hose on high and see if water comes out of the exhaust port. If so, then you're good to go, if not then you may have a blockage in the tube or in the water passages. Sometimes the impellers can break down and get sucked up in to the water uptake tube to cause a blockage. Good luck. Keep us posted.

 

[3rdtimesthecharm]

Re: `57 35 h.p. big twin thermostat

If you really think you have a blockage try dropping the LU and holding a garden hose up to the copper water uptake tube. Turn the hose on high and see if water comes out of the exhaust port. If so, then you're good to go, if not then you may have a blockage in the tube or in the water passages. Sometimes the impellers can break down and get sucked up in to the water uptake tube to cause a blockage. Good luck. Keep us posted.

I`ll try that.I had a leak at that lower welch plugso i Know water is getting to there.When i replaced that plug,there was a piece of rubber.I just assumed it was from a old impeller.when removed it didn`t resemble anything like a impeller ear.

 

[3rdtimesthecharm]

Re: `57 35 h.p. big twin thermostat

Ok,did the garden hose process,got water to come out of exhaust.Turned to the lower unit.Found the bottom side of the impeller had a small chunk missing,laying on the wear plate.Removed wear plate and layed on workbench.It was warped,bent,whatever.Took one out of a parts motor.It was near new.Reassembled with that wear plate and a new impeller.Pumping water now.Back to the loose welch plug.Any ideas what to do with that?

 

[kfa4303]

Re: `57 35 h.p. big twin thermostat

Hello again 3rdtime. Glad she's pumping water again. I'm not sure how you can "fix" a welch plug though :/ I supposes you could put a thin bead of JB weld around the perimeter of the plug to seal it. I'm pretty sure it would work, but you may never get it out again :/ Maybe you can remove it and replace it with and OEM plug?

 

[3rdtimesthecharm]

Re: `57 35 h.p. big twin thermostat

I thought about j.b. weld. Or a rubber expandable plug like a automotive freeze plug.A friend said ping the edges of the plug with a punch.Grainger has welch plugs .You have to buy a life-time supply but they`re cheap.

 

[samo_ott]

Re: `57 35 h.p. big twin thermostat

You can also use high heat silicone on the welch plug. Also you can try to tap it in the middle with a hammer and a small socket to see if it will expand anymore to set better.

 

[BonairII]

Re: `57 35 h.p. big twin thermostat

There's not a lot of pressure under the plug, so I'm guessing any decent sealant would work(and could be taken off in the future, if need be)

 

[1946Zephyr]

Re: `57 35 h.p. big twin thermostat

Which welch plug are we refering to here? Is it the one on the head?

 

[3rdtimesthecharm]

Re: `57 35 h.p. big twin thermostat

Which welch plug are we refering to here? Is it the one on the head?

Yes, the one near the bottom of the head.Right side viewing from the rear.

 

[3rdtimesthecharm]

Re: `57 35 h.p. big twin thermostat

Installed welch plug.Went for a shake-down cruise.Slow leak at first then after about 15 minutes it quit.Going out for a longer cruiser later on with my fingers crossed and my always dependable` 54 5horse Sea King just in case.

 

[3rdtimesthecharm]

Re: `57 35 h.p. big twin thermostat

Good cruise.Didn`t have to get the Sea King out.A guy on the beach wanted to buy the Evinrude.We`ll see what happens.