Cylinder Head Cover screws and Temperature swtich question

[Guest]

1993 Evinrude 30hp - E30RETA

Ok, I'm so I'm used to paying a little extra for marine parts but $50 to replace all the cylinder head cover is a little ridiculous.

My first question is are there any alternatives for the screws? I believe they aren't even Stainless because the heads are all rusted. Have any of you replaced them with stainless screws?

Also, What does the Temperature switch do? I'm wondering if I should replace it while I have the cover off, I'm replacing the thermostat.

 

[tashasdaddy]

Re: Cylinder Head Cover screws and Temperature swtich question

switch causes the horn to sound when it runs hot. those bolts are hardened bolts.

 

[Guest]

Re: Cylinder Head Cover screws and Temperature swtich question

switch causes the horn to sound when it runs hot. those bolts are hardened bolts.

Is there a way to test the switch? on the voltmeter?

 

[HighTrim]

Re: Cylinder Head Cover screws and Temperature swtich question

Heat switches, installed in each cylinder head, are in series with a "HOT" warning horn in the remote control box. Should an irregularity develop in the cooling system and cause abnormal water jacket temperatures, the switches close the warning circuit. A switch may be checked by submerging it in hot oil. Using a test light to check the contacts and a thermometer to check oil temp., the contacts should close at a temp of 211 F + or - 6 and open at 175 deg F plus or minus 7.

 

[Guest]

Re: Cylinder Head Cover screws and Temperature swtich question

Heat switches, installed in each cylinder head, are in series with a "HOT" warning horn in the remote control box. Should an irregularity develop in the cooling system and cause abnormal water jacket temperatures, the switches close the warning circuit. A switch may be checked by submerging it in hot oil. Using a test light to check the contacts and a thermometer to check oil temp., the contacts should close at a temp of 211 F + or - 6 and open at 175 deg F plus or minus 7.

Even for a 30hp the temp circuit closes at 211F? That seems pretty high, but I'm not an expert.

Thanks for the info...

 

[wavrider]

Re: Cylinder Head Cover screws and Temperature swtich question

It is rather high and by the time the horn goes off you may have caused some damage, alot of people use a temp sensor and gauge in conjunction with the temp switch so the temp can be monitored and the alarm is backup