1975 Srv 180 165 Hp

[rmharrison]

Went out over the weekend to enjoy some time on the river. I ran the boat a little hard to see what it could do. As it was nearing what I believe was top end it stalled like someone turned off the key. I tried to restart but it wouldn't. I opened the hatch and pushed in the circuit breaker and checked the plug and distributor wires. After sitting for about 5 minutes or so it restarted. I ran it up to a cruising speed of about 25 mph and it seemed to run fine after that. I did not take it back up to full speed after that. Any one have any ideas what might have made it quit so abruptly like it did. Could a bad coil make it act like it did? By the way this is a GM 250 CU. IN. inline six. After doing a tuneup it seemed to run fine except for the stall. Does anyone have any suggestions. I could use some help here.

Thanks in advance.

 

[KRB64]

I'm no mechanic but in general, if it stumbles first it can be fuel; if it flat out stops it could be electrical. Maybe something as simple as a loose connection.

Really need more detail. Is it the OEM engine or a newer electronic one, etc?

Unless the problem is obvious, I usually have to experience it several times before I can start narrowing it down...

Sorry to not be more help,

 

[rmharrison]

It is the original 1975 GM 250 CID that came new with the boat. I would have thought if it would have been fuel I would have seen other problems. The only thing that I did not change during the tune up was the coil. I am no mechanic, just a parts replacer, and don't know if a coil could act that way or not. They are $50, while not that much I don't want to just replace it if it is not possible that it could be faulty. Other than for that one time the motor has run flawlessly, you can't even hear it turn over when you turn the key, it just starts instantly. It ran well at low rpm's and ran well at cruising speed, it actually ran well at full throttle until it stopped. I really don't want to spend the $300 it will ultimately cost me to go to my mechanic just to find it was something simple that I could have replaced.

Thank you for the reply.

 

[KRB64]

I really don't want to spend the $300 it will ultimately cost me to go to my mechanic just to find it was something simple that I could have replaced.
QUOTE]

I understand completly. Since you did a tune up and it runs so good otherwise I'd double check for loose connections.

I'd be suprised if it was the coil but I've been suprised before. Lets see if she'll act up again or if a real mechanic will chime in...