Jeff That paper gasket isn't a template. It's the actual gasket you're supposed to use. If you're needing to install a thicker gasket to get it to stop leaking, something else is wrong. You should be able to get the new impeller in so it's flush with the surface before installing the cover. Since you had to remove the shaft, you will have to turn it to the correct orientation before it will go back in all the way. This hard to do with the impeller installed, so you may want to slide it in by itself first, then mark it once it's all the way in so you can make sure the alignment doesn't change once you put the impeller on. Use lots of Dawn dishwashing soap to lubricate everything.
I think there's a pdf copy of the engine manual in the files section, and it has a section with the step by step instructions. It does say in there somewhere that if you remove the shaft, you'll have to remove the entire pump in order to reinstall it. I didn't have to when I did my impeller last year, so I can't say that that's always true. Lee header image LEE A. SCOTT Shelby, AL http://www.oldjags.com [email protected] <mailto:[email protected]> <mailto:[email protected]> Jeff Sheler wrote: > > > Thanks David. So yesterday I replaced the impeller. It was in bad shape. > About a third of the blades had broken off. Unfortunately, I was able to > recover only about half of them. How serious of a problem is this? How > do I > go about finding the missing ones? > > A few more questions and observations: Extracting and replacing the > impeller > was no easy matter. This is a 1989 boat with a Sherwood pump. There was no > way of removing the impeller without also pulling the shaft, even after > removing the snap ring. Once the shaft/impeller assembly was out it took > some hefty pulling to get the impeller off the shaft, and it took a couple > of firm taps with a hammer to get the new one on. Is this unusual? When I > reinstalled the shaft with the new impeller, the impeller protruded > about a > quarter inch outside the pump casing, Eventually, by tightening the cover > screws, I managed to stuff it all back in. Is this normal? And > finally, when > I initially removed the cover there was no gasket to be found. Maybe > the old > one had disintegrated over time. In the box with the new impeller was a > paper "gasket" which initially I installed. Later, when the pump > leaked like > crazy after I opened the sea water inlet, I realized that the paper was > probably a template, which I then used to cut a cardboard gasket. Is that > the way it is supposed to be? I guess I assumed there would be a rubber > gasket. > > Jeff Sheler > s/v Windsome > Portsmouth, VA > > _____ > > From: [email protected] <mailto:IC27A%40yahoogroups.com> > [mailto:[email protected] <mailto:IC27A%40yahoogroups.com>] On > Behalf Of > David Savlin > Sent: Thursday, July 30, 2009 12:32 PM > To: [email protected] <mailto:IC27A%40yahoogroups.com> > Subject: Re: [IC27A] Universal M-18 heat exchanger > > > I agree with jm_wilhelm -- having realized we ran for 7 years on a single > impeller, and noticing the engine temperature rising on our winter > haul-out > transit, we discovered half the impeller blades had broken off. Lucky for > us, we were able to account for each blade upon replacement. It is > generally > recommended to replace the impeller annually given how cheap and easy > it is, > though I personally believe every 2 years or 50 hours of engine runtime is > probably sufficient. Woe be you if the broken impeller blades get sucked > into the heat exchanger, or worse, a manifold inside the engine. I'll note > that engine temp rose by only around 20 degrees owing to half the impeller > blades still being intact at replacement. > > On a related note, is there a zinc on the heat exchanger? How can I > find it? > Persephone ('88 hull 6480) has always run in freshwater, is it true that > zincs tend to degrade slower than in saltwater? > David > On Thu, Jul 30, 2009 at 8:20 AM, <jm_wilh...@yahoo. > <mailto:jm_wilhelm%40yahoo.com> com> wrote: > > > > > > > If your having slight overheating issues check your impeller since it > might > > need replacing...or check to see if you raw water intake isn't > gunked up. > > Those would be more likely causes > > > > -----Original Message----- > > From: "Jeffery Sheler" <jshe...@cox. <mailto:jsheler%40cox.net> net > <jsheler%40cox.net>> > > > > Date: Thu, 30 Jul 2009 13:08:58 > > To: <ic...@yahoogroups. <mailto:IC27A%40yahoogroups.com> com > <IC27A%40yahoogroups.com>> > > Subject: [IC27A] Universal M-18 heat exchanger > > > > How often should one clean out the heat exchanger on the M-18, and > what is > > the correct procedure for doing so? I've noticed that the engine is > running > > a little hotter than normal lately and I'm thinking it may be time. > Thanks > > in advance for your advice. > > > > Jeff Sheler > > s/v Windsome > > Portsmouth VA > > > > [Non-text portions of this message have been removed] > > > > > > > > [Non-text portions of this message have been removed] > > [Non-text portions of this message have been removed] > > [Non-text portions of this message have been removed]
