It's a black max.... This post may be lengthy, so I appologize in advance....<br /><br />I recently installed a new teleflex temperature guage with a new sender to match... My old guage didn't have numbers on it and I was concerned about what the actual temperature was...<br />So I got it on there and took it out this morning...Both guages measure metal head temps...<br /><br />After leaving the ramp, I noticed that the engine wasn't running properly like it was dropping a cylinder or something. While leaving the no wake zone the guage slowly climbed up to about 140F. So I hit the throttle to get on plane and the motor is really laging, but it does manage to get on plane and picks up speed. I reached about 5000-5100 rpms and this is all the engine has.. I look at the temp. guage and it only climbed to 155F...<br /><br />But since the engine isn't running right I head back to the dock... When I pull off the cowling to take a look at things, I realize that I forgot to plug in the spark plug lead going into the #2 cylinder, which is right above the temp. sender. <br />So I plug it in, and head back out... <br />Now, while in the no-wake zone (1100rpms) the guage climbs to 180f... I hit the throttle and it quickly zaps up on plane (running good). I get up to 5600rpms and look at the guage and it's reading 210-215F. WOW!!!!<br /><br />So I get to thinking... I'm measuring metal temps on the head. And I got readings with the top cylinder dead and while firing and I'm seeing 60 degrees difference. When it wasn't firing and reading 155F, it must have "basically" indicated the water temp more than anything as very little combustion temps came into play. Some possibly from the nearby cylinder, but you get my point..<br /><br />But 215F while it's firing really bothers me....<br />I'm sure the impeller is fine (changed last fall), the t-stats are new, the poppet valve/diaphram/spring is new. Compression is 120psi in all cylinders. The head gaskets are new. And I have good water pressure, 10-12psi at cold start, 5-7psi at idle with the t-stats opened, and climbing to 22-23 psi at 5000-5600 rpms... And I can see the poppet opening and closing at around 2500 to 3000 rpms by looking at the guage.<br />And it pees like a champ....<br /><br />I've asked this question before, but I guess I have to ask again... Can this be normal?<br />I know black max's run hot but is this too hot? Remember my water temps are probably around 145-155F, if my assumption is correct....<br />Any thoughts....
