2005 xr6 150 1B029436 high temp alarm issue

[Dave Ervin]

Sat. 5/18, No idle alarm or low speed alarm, when I get her up on plane a single constant alarm goes off. I shut it down, wait a minute restart no alarm. I can idle to low speed no heat alarm. No temp gauge. I checked thermostats, tested put back in. These are original , 19 years old I am going to replace. Waterpump psi at idle is 2. Low speed 3 psi, up on plane 6 psi but only for a few seconds. I did a motor flush last fall, no change. Checked poppet valve, took apart cleaned, checked diaphragm, gaskets etc put back in last week, 5/10. Any help suggestions?
thx
Dave

[JOE54]

always start at source remove /replace w/p and all 3 gaskets

[Dave Ervin]

Thanks Joe. I am replacing poppet valve and thermostats this weekend. See what happens, waterpump will be next. Dreading this. Last time the bearing race bottom of block came out and had to push it back in. What a nightmare ! Any suggestions on this ordeal?
thx Dave

[JOE54]

im hoping its a popett problem for ya DAVE i know those seals are a pain to get back in mabe its still stuck in crank

[EuropeanAM]

Thanks Joe. I am replacing poppet valve and thermostats this weekend. See what happens, waterpump will be next. Dreading this. Last time the bearing race bottom of block came out and had to push it back in. What a nightmare ! Any suggestions on this ordeal?
thx Dave

I am going to restate Joe's advice: ALWAYS, ALWAYS start AT THE SOURCE: The Water Pump. If, and ONLY if you still have problems after complete pump replacement should you be looking to replace thermostats, poppet valve, hoses, gaskets, or other obscure components.

^^^^ This method has been proven more times than I can count during my 47 years working on these engines.

[Dave Ervin]

Thanks for good advice, experience will prevail!!

[JOE54]

every time DAVE