chrispbrown27
Well-known member
I finally gave up on my 72 johnson 25 and bought a 2002 Yamaha 25 hp 4 stroke (F25ESHA) yesterday. I broke my own rules of not buying without a compression test or hearing it run, but based on the condition I was willing to take a chance. While reading up on maintenance requirements (this is the first 4 stroke I have never owned a 4 stroke or even known anyone that has owned one so it's all new to me) I got to thinking about buying a back up prop since I have wrecked a prop or two on the water and wished I had a back up. Back in the mid 90's my Grandpa bought a brand new 30 horse Evinrude and considered buying a stainless prop, but was told that stainless is too heavy for a motor under 50 horse. Is this even remotely true? I commonly hunt and fish areas that are fairly stumpy, so would it be a good idea to use a stainless prop? I certainly like the price of aluminum props and the repairability of aluminum, but if a stainless would take hits on wood better without breaking itself or tearing up anything in the motor I wouldn't mind spending the extra money.
I also have a few questions about 4 strokes.
Is it really necessary to use an oil like Yamalube or is it perfectly fine to use any good oil? I know that on cars/trucks beyond a certain age they recommend sticking to dino oil and not going to synthetic because of smaller molecules that might slip through old seals that the dino oil doesn't, so is this true with outboards? Once the weather warms up a bit I am planning on draining and refilling the lower unit lube, change the impeller, new spark plugs, and lube things up. Anything else you can suggest that I do?
Chris
I also have a few questions about 4 strokes.
Is it really necessary to use an oil like Yamalube or is it perfectly fine to use any good oil? I know that on cars/trucks beyond a certain age they recommend sticking to dino oil and not going to synthetic because of smaller molecules that might slip through old seals that the dino oil doesn't, so is this true with outboards? Once the weather warms up a bit I am planning on draining and refilling the lower unit lube, change the impeller, new spark plugs, and lube things up. Anything else you can suggest that I do?
Chris