FROZEN Posted February 28, 2018 Report Share Posted February 28, 2018 I learn something new every day. I was talking to my local Yamaha service manager (ex-factory engineer) about an intermittent cooling alarm and reduction to idle. Probably need a new water pump, he says. Maybe poppets and thermostats, too. Anyway, after scheduling the work, he asked me what I would do if the impeller spun on the shaft, rendering the cooling system inop., 25 miles out in the Gulf. Shrugging my shoulders, he told me that if I run the raw water wash down hose to the motor flush port, I should be able to cruise back, no problem. There is a minimum pressure required, but he checked my pump, and said “good to go”. Didn’t say how much, but I have a PF installed, rarely used pump. I asked why there was no mention of this in the manuals, then HE shrugged his shoulders. Probably b/c Yamaha doesn’t supply the pumps, boat builders do, he speculated. He remembered when he worked at the factory, a group of guys went to the Bahamas, and had a total failure just leaving for the return trip. They rigged up a hose and nursed it all the way back to Fl. “Brilliant!....the staff said! i bought a 4’ hose at ACE and put it in the ditch bag. Like I said....learn something new every day! Link to comment Share on other sites More sharing options...
Lap it Up Posted February 28, 2018 Report Share Posted February 28, 2018 I don't run a washdown pump but that is a pretty good idea for an emergency. Link to comment Share on other sites More sharing options...
SCFD rtrd. Posted February 28, 2018 Report Share Posted February 28, 2018 That's a great idea, could save someone lots of misery. Link to comment Share on other sites More sharing options...
Wanaflatsfish Posted March 1, 2018 Report Share Posted March 1, 2018 there was a discussion about a similar topic related to jack plates on the FS forum....the idea was to use a RAW pump and run it into the engine while running with the JP up on 6...seemed to work, but, very risky...... I think your info is good....but, the potential for a impeller failure, for someone that changes it per schedule - e.g. every couple hundred hours, depending on use....is probably minimal... dc Link to comment Share on other sites More sharing options...
whichwaysup Posted March 1, 2018 Report Share Posted March 1, 2018 in a bind, a livewell pump might be another option, at least to limp home, for those without a wash down. Link to comment Share on other sites More sharing options...
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