Mercruiser 5.7 V8 Alpha One: Tstat, Tstat Housing, and Exhaust Cleaning

gaskets used: amzn.to/43AnrUe
brushes used: amzn.to/3O2yyjh
razor scraper tool: amzn.to/3NVEVox
thermostat kit: amzn.to/3Q01Xxb
brass wire brush kit: amzn.to/43uC0Zz
infrared thermometer: amzn.to/43zLLpB
A descriptive video on replacing the Tstat, Tsat housing, and cleaning he exhaust elbows! Of course if there are better techniques please leave them in the comments below! I try to respond to everyone but it is difficult! I appreciate all the support as I venture into all things Mercury!!!!

[@cheapme1850]

On my boat, it has a brass tube securing the thermostat in the housing. It should freely slip in and out of the housing instead of forcing it in with the cover. If it doesn’t, you need to continue cleaning the rust out with a wire brush until it does. If not, you’ll have to remove the entire housing again to get thermostat out instead of just removing the cover.

[@MrCantrucker]

I bet you have some Yamaha black where you go? I do lol

[@rickybrackin543]

Just redone my trailer in this heat think i died once. Be careful

[@terryschlagel5628]

Need your help son, cantvfind videos for output voltages on coils,switch box's etc. All new from flywheel to coils. Ran great all season so far until last, week will not plane out or high speed, 78 merc 90 hp cdi thunderbolt 3

[@MerCSonL6]

I have videos on how to test coils. Switchboxes should be putting out around 200-250 volts to the coil. You will need RM to test the alternating currents if my memory serves me correctly.

[@MerCSonL6]

kzbin.info/www/bejne/qKibY3dthZaee8U

[@terryschlagel5628]

Ah yes you the man thank you

[@davidbrennan5]

I am hoping maybe you could help. I am working on a 60hp 3 cylinder Merc maybe from mid to late 80's or so. I did the fuel lines and cleaned the carbs changed the plugs. Rebuilt the fuel pump, new starter, new coilpack and it starts and runs only when I spray premix in the carbs. The needle/seats are good the jets are clean. The starter will not stay engaged it only turns for a couple seconds then drops. The fuel screws are set about 1 3/4 turns out.

[@MerCSonL6]

Does the engine fire? That kicks down the starter gear. Son

[@davidbrennan5]

@@MerCSonL6 no, it just kicks up then down. He thought the starter was bad. He put a new one on. The starter has a 10 tooth gear on it. Good wiring, new solenoid new battery. New rectifier. This is my bosses boat he threw a pile of money at it. Compression is very good. Chokes and linkages are good. New lines/connectors to tank good fuel flow to carbs, new fuel filter. The ball gets hard. Needle/seat are sealing. It runs if I spray premix in the carbs but it doesn't idle perfect. This one has me scratching my head. Spark is hot. I was thinking maybe order new jets but they were clean. I soaked the carbs and went through them.

[@MerCSonL6]

@@davidbrennan5 replace the starter

[@davidbrennan5]

@@MerCSonL6 he tried 4 of them so far, I looked up the specs and the gear is right amount of teeth.

[@davidbrennan5]

I load tested the battery and it is putting out 700 amps.

[@bulistik5039]

What about that gold colored gasket as this guy shows here. Not very good explaination of the gaskets and rubber o ring that come in the package with the thermostat kit kzbin.infoXdhuFcNFCIM?si=6vcHEha9bThJKvtk