I bought a 5Hp Rover Shredder with a blown motor. Rod through crankcase job.


I bought a Rover super four 21" with a white 5Hp on it that i bought for its motor.
Had a fiddle with it last night. 80psi compression, and a good spark. 5 thou inlet, 8 thou exhaust so thats all good. Fresh fuel in the tank, no go.
Fuel down the carb and it goes but wont keep running. Put the tank off the Shredders blown motor on it, got it set up, it will run and got it tuned OK, seems a bit rich but still gives a lean cough when winding the mixture screw in. Back it out a bit and when you rev it it still pumps a bit of soot. Not to fussed about that as its not under load.

Shut it down, and it wont start hot. First compression stroke of the first pull it fires once but then nothing. Put it on choke and it will fire a few times and you have to be quick but if you can flip it back to a slow engine speed it will catch on.


Any ideas???
Could it be spark?? should i put the electronic coil on it off the blown motor??? Perhaps its a bit worn or the timing/points are not set up right.

Open to suggestons.


Ive got a rover side throw as well, its got a 5hp I/C motor on it. Going to look at it tomorrow. I might use it instead. The Shredder is a keeper.


Bob.