Low water pressure and other Problems-70 hp omc

[outofluck]

I have a 70 hp evinrude, I think it is an '88 model. I have low water pressure and have had a water pump and impeller installed. Water pressure is still low. I have checked the thermostat, head cover and the exhaust cover for build up.<br /><br />1. The spring is broken in 2 locations on the thermostat.<br />2. The head had only mild build up.<br />3. I broke off 3 bolts in the exhast head and have broken an ease out in one of them.<br /> <br />Will the thermostat spring being broken cause low water pressure?<br /><br />How do I get these bolts out? Can I use sleeves once they are out if the threads are messed up?<br /><br />Please help!!

 

[DJ]

Re: Low water pressure and other Problems-70 hp omc

Unless you are REAL handy, I'd let a machine shop get the bolts out and the easy out.<br /><br />Or, you can pick up a cylinder head from these guys, relatively cheap.<br /><br />www.twincityoutboard.com<br /><br />The broken spring would allow the stat. to remain open. Not the cause of low pressure.<br /><br />I don't know who replaced the water pump, but be aware there was an updated kit. from OMC, for the triple cylinder "loopers" like yours.<br /><br />If you did not get a genuine OMC/Bombi kit, you may have the old style pump.<br /><br />Also, realize that water pressure is relative. It depends on where/how the pressure guage was plumbed in.<br /><br />As long as you have no overheat and the pressure remains constant, you have no issue. The issue arises when you see a change.

 

[outofluck]

Re: Low water pressure and other Problems-70 hp omc

ok, I'll look in to that. thank you for all oh the advice.