Suffolk super colt 75cc engine rebuild (Part 1)
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- Опубліковано 28 чер 2010
- My poor little 75cc suffolk engine was smoking like no tomorrow, so at first I decided to clean it out and try thicker oil. However I have now decided to replace the rings as the bore is pretty good. Stay tuned for part 2 in the engine rebuild series :)
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The trouble with mower engines is that they were thrashed mercylessly by people who havn't got a clue about engines. Most of the Suffolks I have seen clag for England.
One thing I would try is removing the piston and soaking it in white spirit to get the dirt out of the rings. You can then bend the rings open a tiny bit, stagger them and then put it back, worked for me!
Nice little engine, good luck with it.
Hi, there are a few features on the Suffolk mowers which can give a rough idea of the age. The early 50's Suffolk mower had a rectangle tank on the cowling, the dip stick in the sump and SIF cast into the pull starter. Early 60's models had a larger tank on the cowling, the dip stick in the block and a blank starter. Later 60's models had the tank mounted on the handles. And the really late Suffolks had a plastic recoil. Not the metal one.
This suffolk is late 60's. Cheers, Dan
Very important is honeing. You can do it with some very fine emery paper. Just try and achieve a cross hatch pattern and you should be fine.
So after several attempts to get my colt to throttle up but failing i decided to strip it down as 40 psi compression was low i think. Glad i did as all was revealed . The oil flicker had broken off and obliterated. the head is clean and smooth but the piston and crank housing is grooved to hell thus confirming lack of oil and metal splinters working up the piston.
@steamwally yes your right there, i often see mowers being used at full throttle its just not needed. I can cut my grass with some mowers on tick over :)
Don't forget I will need to hone the cylinder to remove the glaze, if i don't all this work will be wasted :(
@MO3MINI lol I saw part 2 can't wait for part three! I live in the US so I've never seen a suffolk :( but they look like cool engines!
@SuperKONR yes you did see random cat-age in the video :) and there was loads of carbon and oil in the engine all clean now see part two :) I also think another one of my videos has random cat-age
Did I see random cat-age? lol Thats a lot of carbon!
@reynardfoxx cheers it will be nice when i finish it, just got two more mowers to get going so this is being pushed back :(
@steamwally ok cool, im going to ask my uncle if he has a honing tool. If he does it will probably be as old as the mower :)
@morrisminormods :L well i wont be using that now, the engine is completely in bits now. Piston is out and rings off i have a gap of 23 in the ring :O well and truly ruined, do you still have that honing tool?? will it go down to a 75cc bore and can i borrow it hehe