I was fortunate to acquire a beautiful 1990 292 last year ... I did all the required EOY maintenance ... and she is sitting in my heated garage. However, I have a question ... what are the recommended guidelines for changing the Impellers. Some people change them every year ... some people have never changed them ... any advice?

Cheap insurance. Many go with new every season.

I've gone to every two years with mine, since I've been using the boat less...
BUT...

I have mechanical water pressure gauges and ALWAYS have my eyes on them when running the boat.

It's a pretty easy job which is why many do it every year. Last thing you want to do on a Saturday morning or while out on the water is change an impeller. Plus it's cheaper to replace just the impeller rather then the entire housing if it gets scored when one really goes. I take the every other season approach for replacing, but always have a spare on board just to be safe.

I've also heard to wait until after spring commissioning after layup, this way the first cranks after sitting for the winter are on the old one. This way you got a fresh one for the start of the season.

This is an easy DIY job?

It's not a bad job. Many folks can do it. It may be difficult to reach them on your boat though, but a mechanic doesn't have any magic tools that you wouldn't have for the same job. I can do it in about 15 minutes as an amateur; but I can climb in my bilge, sit Indian style in front of my motors and reach everything without even spilling my beer. Not all boats are this accessible. There are a few boats that you could not pay me enough to attempt that job.

Do a few searches. There are dozens of threads on this topic.

I am going to be screwed ... should of bought a bigger boat :+)

Change them every Friday, cheap insurance. Haha, just kidding. Realistically, although many do it every year and that is fine, every other or even every third had never been an issue for me. I have 5 years on one in an alpha with no issue, but will be changing it this spring. I do however change oil and drive lube every year.

Really though, an easy change depends on the boat, and I wouldn't call changing them in your 292sr1 easy, in fact its kind of a pain and you need to do it twice (2 engines).

As was stated, change them in the spring, it is them sitting still in the housing through the winter that is hard on them, so you wouldn't want to put brand new ones in in the fall.

Few of these and it won't seem so bad...

ahh where are all the 272 owners LMAO they even suck on my 303, at least the port motor does, but not really bad, just pick a 65 degree day so your not rushing, If u just bought the boat I'd do them, start fresh if the ones u pull off look good, keep as a spare, they always seem to go after hours or on a holiday, I know many who go 5 years, I'm going on 4 and am gonna replace after the first start up, IMO the less u use your boat the more often u will need to replace it, But thats just my theory, probably not worth a darn

Best advice if you do it yourself just remove the entire pump don't try replacing just the impeller with the housing still in the boat. 2 hoses and a few bolts the whole housing comes out and you can work on it in plain sight and not hanging upside down in a very cramped area.