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Suzuki DF 4hp/5hp the difference.

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Suzuki DF 4hp/5hp the difference.

Postby Andy B » 12 May 2018, 19:02

If you have a Suzuki DF4 and were wondering if there was any way to coax a little more out of it, the conversion to 5hp is simple.
You may ask what's the point for one horse power?
Or you could say that's a 25% gain, depending on how you look at life ;-)

All you have to do is move the throttle cable, yes it really is that simple :D

The 4hp and 5hp are identical it just that the 4hp model has restricted butterfly movement.
By moving the cable you then fully open the caburetter butterfly and achieve full power on this engine.

Cable position for 4hp
20180512_194851.jpg


Cable position for 5hp
20180512_194952.jpg
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Re: Suzuki DF 4hp/5hp the difference.

Postby Cliff » 12 May 2018, 19:12

:clappy Well spotted, and the crafty sods charge a hundred quid + extra.
https://www.marine-matters.co.uk/suzuki ... suzuki-df5
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Re: Suzuki DF 4hp/5hp the difference.

Postby Andy B » 12 May 2018, 20:38

Well I thought what's the point of running it at 4hp when the potential is there to make it run at it's designed output.
Unfortunately the 6hp is a totally different beast.

20180415_164950.jpg
edit-image orientation
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Re: Suzuki DF 4hp/5hp the difference.

Postby Paul » 12 May 2018, 21:33

Well spotted Andy and a great tip :thumbsup
I've an old BF 9.9 Honda and after checking all the specs against the 15hp were exactly the same.
Wound out the throttle stop and got me to 13hp.
If you wanted the full 15 hp then reem out the carb inlet and change the main jet, good to go ;-)
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