How secure is your prop!

Sometimes pullers don't fit very well. I am a fan of 'ringing', as above deadweight and lump hammer, never failed for me, but my prop was 28in diameter so lots of meat. A more correct engineering method would be to drill and tap two holes in the prop boss looking forward opposite sides of the shaft hole. Then a steel plate with similar spaced holes is placed across the shaft nut, and two bolts wound into the prop to pull it to the steel plate, or use them to bolt the puller to the prop, rather than trying to get round the blades.
 
MagicalArmchair said:
The puller I used was awesome: http://www.albinballad.co.uk/how-tos/fit-a-flexofold-propeller/

One of these: http://www.sealey.co.uk/PLPageBuild...&requiredresults=16&grouplevelonly=&fulltext=
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I made one like this from thick steel plate and screwed rod

s-l300.jpg


Just tighten it up then give the prop a wack with a hammer.
 
The first time I tried to get my prop off I enlisted the help of a guy who works on boats in the yard. He had a big puller with a two bar. He would this up as far as he could and then applied a blowlamp to the prop for over 10 mins. BANG - I jumped as it flew off and was still too hot to touch for ages.

This year I discovered my prop was loose although the nut was secure. I had it refixed by an engineer and he drilled a new hole for the split pin through the brass nut and the shaft with a cobalt drill and lots of cutting fluid. Experienced hands make these things look easy.
 
MoodySabre said:
The first time I tried to get my prop off I enlisted the help of a guy who works on boats in the yard. He had a big puller with a two bar. He would this up as far as he could and then applied a blowlamp to the prop for over 10 mins. BANG - I jumped as it flew off and was still too hot to touch for ages.

This year I discovered my prop was loose although the nut was secure. I had it refixed by an engineer and he drilled a new hole for the split pin through the brass nut and the shaft with a cobalt drill and lots of cutting fluid. Experienced hands make these things look easy.
Click to expand...

When mine came off it came off with quite a bang, certainly made the eldest jump :)
 
I can't offer any practical advice, but perhaps some consolation: I spent ages trying to remove the prop on a previous boat. Phase 2 or 3 of the task involved driving dozens of miles to buy a puller, which disintegrated when I wound it up. I eventually gave up, and paid the yard to do it. :rolleyes:

Now having the benefit of practical advice such as that above, I better understand how to tackle the task, and might even attempt it again one day, which at the time I swore I never would.
 
MagicalArmchair said:
I have one of these as well, however I couldn't get it behind my prop as I was lacking in space, hence the Sealey beast came into play.
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Well I made the plate with the slot just thick enough to go between the prop and bearing. In any case there should be a gap about the dia of the shaft to allow water flow through the stern bearing.

35696700160_f60790661b_b.jpg
 
My prop which I fitted several years ago, has a large hex brass nut with a smaller locknut on the outside. When fully tightened up I drilled a 1/8" hole for a split pin for security. After reading this thread I didn't realise that the thinner lock nut should be next to the prop - and I've been in engineering for decades!
 
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