Suzuki df2.5 telltale

[Bikerwookie]

I have searched online for info on this one but come up with a blank.

My df2.5 appeared to overheat yesterday after over 1 hour of running. Thinking it would be the impellor I rowed back the 5 miles and stripped it. All is fine and the thermostat is working.

The tell tale has the two holes at the back of the leg and splutters out water almost in a mist. It has done this since new. When I look online at df2.5s I see videos of some tell tales producing one stream of water and others producing the mist from two holes.

Everything looks clean inside the thermostat housing with no salt build ups.

So is it ok to just produce a mist from the two hole tell tales or is the impellor not producing enough flow?

 

[captainboo]

If it helps mine, as used two days ago, and bought about a year ago, produces a mist/splatter out of the two hole fitting and a very strong stream out of the single hole all at the same time.

 

[VicS]

Refer to the owners manual but there would normally be some water, maybe no no more than a few droplets or a fine mist, blown out of the back pressure relief ports on the "leg".

If the engine in question also has a tell tale then there should be a constant stream of water from this.

 

[LadyInBed]

How old is the engine?
Have you checked the impeller?

 

[Bikerwookie]

Impellor is fine but is a 4 blade so will change that to a 6 blade. I cannot see a telltale and the owners manual just says about the two holes and a mist. The confusion I have is that some have a tell tale and some appear not to. Mine is one of the earliest engines.

 

[Storyline]

Different engine (Tohatsu 5hp 2st) but same problem. It showed a weak flow when new but now nothing. Had it professionally serviced and a new impeller fitted and the (good) engineer could not see the problem.

 

[Alex_Blackwood]

Impellor is fine but is a 4 blade so will change that to a 6 blade. I cannot see a telltale and the owners manual just says about the two holes and a mist. The confusion I have is that some have a tell tale and some appear not to. Mine is one of the earliest engines.

That is what you get with the early DF2.5's so don't panic. Believe Suzuki changed the design after a couple of years on these engines to provide a tell tale.

 

[Bikerwookie]

That is what you get with the early DF2.5's so don't panic. Believe Suzuki changed the design after a couple of years on these engines to provide a tell tale.

Thanks that's what I was hoping. Still I'm perplexed why it go so hot. I also have a non standard looking m5 bolt that goes into the crankcase from below. Thinking someone previously may have blocked the tell tale hole. It seems to do nothing.

Has anyone a photo of the later df2.5 showing the tell tale and from where it comes?

 

[VicS]

Thanks that's what I was hoping. Still I'm perplexed why it go so hot. I also have a non standard looking m5 bolt that goes into the crankcase from below. Thinking someone previously may have blocked the tell tale hole. It seems to do nothing.

Has anyone a photo of the later df2.5 showing the tell tale and from where it comes?

A blocked tell tale will not cause overheating. the function of the telltale is just to confirm that the pump is pumping OK

 

[Slowtack]

My Johnson 2.5 is apparently a rebadged Suzuki now 5+ years in use and same water exhaust as described above.

 

[Forest Girl]

Your engine doesn't have a conventional telltale water jet. The splutter/mist is normal. Mine is the same (5 yr old). It does have water cooling though so check nothing is choked with salt etc.

 

[Bikerwookie]

I have now changed the original 4 blade impeller to a 6 blade and removed the thermostat for good measure. It now puts out a lot more spray even on tick over. Previously you had to rev it several times to get it to spray.

I'll give it some beans for an hour on the dinghy before trying it with the thermostat in place. Might take some warming up but better than overheating.

Thanks for all the comments.

 

[Slowtack]

Careful about removing the stat...........
I was advised to do this to avoid overheating. Did so and then had problems with oil emulsifying - said to be caused by engine running too cold with condensation in the sump.
Put stat back in and no more emulsifying but back to former minimal spray.
Que sera.................