1969 Johnson 85hp stalls after 30 mins !??HELP !

[xxwulvexx]

Hey guys......<br />my Johnson starts ok , runs perfect for about 30 minutes , then stalls out...and once it restarts its idles very poorly and when i try to give it some throttle it bogs down and stalls out... Any one have any ideas on what this could be ? and secondly , Does anyone know if there are 1 or 2 thermostats on this engine? and where they or it is located?

 

[Solittle]

Re: 1969 Johnson 85hp stalls after 30 mins !??HELP !

Tom - I suspect that your motor is getting hot - hot - hot. I don't remember the 69s but most OMC V4 thermostats can be found a housing that has what looks like small radiator hoses that connect to the bottom of the heads. You should replace the water pump and the tstats. Your motor may have a temperature sending unit in the heads that can/should be checked by grounding the wire (brown for most) with the ignition sw on. That should activate a horn (for overheating) in the control box.