FORUM RULES UPDATED - The forum rules have been updated to continue to provide a friendly and safe environment for our member community. Please take a moment to review the updated rules and our terms of use and privacy policy. Click here for Forum Rules which has links to the 'terms of use' and 'privacy policy'.
In Other News . . .
You will notice a few enchancements to the forums to make your experience better. These include: Email Notifications, Thread Previews, Thread Starter Notation, and Emoji Options on the 'Like' icon. . .
Additionally, the merchant portions of the website have been updated and are now operational. . . . Check out iBoats for all your boating gear.
I just ran did a compression test on my 62' 40 hp evinrude. Model # 35531. I understand it is supposed to be even in both and around 90 psi. I had 46 and 48. I used the pull starter, would this make a difference?
Does it have electric start? If so, try that. Pretty hard to pull a 40hp motor and get representative compression. At least they are about the same both cylinders.
I tell yah, I couldn't get more than 70 psi on my '62 28hp. It's a hard pull, and I almost tipped it over the stand, LOL!
They say it's easier to pull when it's on a boat. I haven't tried that yet though.
Well, I hooked up battery and got it to 58 and 60. I am going to try putting some pb blaster or mystery oil in the cylinders and let it soak for awhile before I go any further into the head. which one would you use, pb blaster or mystery oil?
Having said all that a lot of testers will vary with their results. Try it on something else like your car to see if it is just a low reading tester unless you have got better results with the same tester previously.
