Stalling when put in gear

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daydreamingdave
Posts: 21
Joined: Tue May 29, 2018 10:33 pm
Location: Ireland

Stalling when put in gear

Post by daydreamingdave » Tue May 28, 2019 3:00 pm

Basically it runs fine with no prop, in gear and out. I put the prop on and it just stalls.
The prop is the kind with the internal spring.
I would normally say it is fuel starvation, but the carb has just been cleaned and is fine.
Plenty of fuel getting there, and the breather on the tank is open!
I can put it in gear and turn it over freely so something else might be at play.

Is the prop on the correct way?

Thanks
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Charles uk
Posts: 4699
Joined: Wed Feb 27, 2008 4:38 pm
Location: Maidenhead Berks UK

Re: Stalling when put in gear

Post by Charles uk » Tue May 28, 2019 5:19 pm

Try increasing the tickover revs.
Make it idiot proof and someone will make a better idiot.

Horsley-Anarak
Posts: 2743
Joined: Thu Aug 07, 2008 8:42 pm
Location: Surrey

Re: Stalling when put in gear

Post by Horsley-Anarak » Tue May 28, 2019 6:46 pm

Put it on a boat, that may solve it.
I have a 2hp Honda that runs like a pig in the tank, sweet as a nut on a boat.

Test tanks do sometimes make engines run poorly.

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Oyster 49
Posts: 3146
Joined: Tue Oct 26, 2010 6:55 pm
Location: Derbyshire, UK

Re: Stalling when put in gear

Post by Oyster 49 » Tue May 28, 2019 8:05 pm

Yes, as Charles says your tickover could be a tad to low.

daydreamingdave
Posts: 21
Joined: Tue May 29, 2018 10:33 pm
Location: Ireland

Re: Stalling when put in gear

Post by daydreamingdave » Tue May 28, 2019 10:27 pm

Well, before I took the plunge and stripped the gearbox again, I did a quick run through.
I have modified this engine to be 9” longer than standard.
It is now 38” (965mm) from the transom to the skeg.

This gives me clear water to the prop and keeps the intake under water if I move forward in the boat!

The result was too much back pressure.

Holes drilled in exhaust and now it runs sweet!
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