Suzuki DT70 issue

[The Dogs Pollacks Brother]

Morning all....
Took the boat out on Saturday from the marina to join a flotilla up the Pembroke river to Pembroke castle (very nice as well!). No problems going down Milford Haven and then a slow run up the river to the castle.
Pootled about in the castle pond with all the other boats for a while , then started the return leg back to Neyland. No issues at slow speed, but when I opened her up to get up on the plane, the temperature warning came on and started to alrarm, then she wouldn't rev (Doe's it go into a "Limp" mode or "Safe" mode?)....I checked the water from the engine which felt fine, no hint of over heating, and seemed a decent stream as well.
The engine eventually cut out, but it re-started at the first turn of the starter motor, with no more alarm or warning light. I then took her steady until I reached Milford Haven, where she went as sweet as a nut again without an issue..
I'm guessing (Hoping) it was just a case of me sucking in a bit of debris...there was a lot about...that blocked the water inlet a little, so it was ok on low revs, but not enough flow on high revs?...then when the engine stopped, the obstruction "fell away" as it were?...It had a good flush through on the pontoon with fresh water afterwards with nothing to be seen as regards debris or water flow..
The engine is new to me with only 40hrs on the clock btw...
Any ideas or experiences guys?
TIA.....

 

[The Dogs Pollacks Brother]

WOW.....331 views...

 

[5teve]

Different engine but on my 140 Tohatsu we pick up weed when out on the ocean if the weather has been rough prior, ok at low speed, but if we pick it up at high speed / revs the low water pressure limp mode kicks in limiting it to 2900 rpm (old fashioned 2 stroke) a quick off the throttle, whack in reverse with trim up a bit, normally clears it and then we carry on..

Could be something different in yours but sounds similar

Steve

 

[The Dogs Pollacks Brother]

Thanks for the reply Steve....sounds all about the same except the engine type!. After the re-start it ran at planing speeds for the blast up the Haven with no issues, so I'm thinking just a temporary blockage....

 

[tico]

+1 There are times in the haven upper reaches when floating weed can be a bit of a problem esp on high tides as it washes off the shores. I bet this is what happened on the river run as it was a big tide. i've had it completely clog the prop when moored at Lawrenny. Once the engine stops for a moment, the weed is washed away and stops obscuring the cooling inlet.

 

[The Dogs Pollacks Brother]

Thanks for the reply Tico.....I'm thinking its nothing more sisnister at the moment..Hows things with you?...I have changed boats now to a nice little Merry Fisher, but I don't want it to sit on that hard ground in Dale where the Grumpy Uncle was, so we are up in Neyland for the season.

 

[tico]

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