QuestionLets see, the crankshaft is vertical...I don't know what that makes the engine...'cause you could say that the pistons are horizontal. : )
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I am willing to attempt it, mostly because I can't afford the local repair rates--and I believe that they (Sears) will say that the only solution is to replace the motor.
I have never worked on this kind of motor; I have done amateur head gasket and cam shaft replacement on car engines, tho.
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Thanks for the reply.
I govenor arm does move freely, and the govenor shaft moves when I move the arm. The springs are all where they have always been. I changed the carb without removing them.
I disconnected the throttle cable and got the same results. No response to the throttle, just full RPM after a second or two.
I loosened the govenor arm till it would rotate without moving the govenor shaft. I put a screwdriver in the slot in the govenor shaft and started the motor. The govenor shaft did not turn at all, I didn't even feel any twisting force on it at all. I am very nervous about shooting rods out of the block, so I didn't try this for more than 10 seconds or so.
I did not try adjusting the shaft's relative position, since it did not move at all.
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Engine # 445777. Suddenly started running at full throttle with no reponse to the throttle linkage. The linkage is fine, the govenor has been adjusted per B&S instructions but no difference. I have tried every suggestion and am now thinking that the only thing left is a bad govenor. I have checked the valves, the carb (which was new last year), replaced the plugs, one magento, the fuel filter, the air cleaner(s),etc. The govenor arm does not move (that I can see) at any time, regardless of load or lack thereof.
The only way to slow the motor down is to over-choke it.
My question is, how do you change the govenor on this motor? Does the motor have to come apart or does the govenor fit into a hole that allows it to be removed from outside the motor?
Answer -
Hi Henry
Wow - you've done alot of work here already. The govenor arm HAS to move or its BAD internally- no ifs ands or buts. This means you have to crack the case halves and see whats worng with the govenor. Make sure the arm isn't bound up somehow, make sure the throttle spring is correct size and attached at the right point.
Tell ya what, do this
1- Verify that the govenor arm moves freely (not stuck or in a bind)
2- Disconnect the throttle altogether, crank it- if it still runs away, go to three.
3- Adjust the shaft in the govenor arm clockwise by loosening the clamp bolt, holding the arm and turning the shaft with a screwdriver. Do this in 1/4 turn increments until top speed is affected.
lemme know how it goes ok?
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Hi Henry
OK- you've done some good work- unfortunately, the problem seems to be internal. Its likely that the centrifigual weights that force the governor shaft to move have suffered some failure. Someone is going to have to crack the case and see what the problem is inside. Sorry bout that. If you want to attempt it- lemme know we'll give it a shot-
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OK Henry
This a vertical or horizontal engine?
AnswerHenry- this is a really big job for us. Not that its technically difficult, theres just alot to do. You sure you wanna attempt this? Here's the basics.
1- disconnect battery- throttle cable - fuel line
2- remove top cowling, oil fill tube, air cleaner- carburator
3- pull flywheel (mnost difficult part)
4- remove engine casing bolts
5- remove top engine casing (carefull, the main crank shaft and the countershaft for the timing gears adn govenor fly-weight assembly will be loose on the top end).
6- inspect fly-weight assembly for problem. Should be a shaft with a couple of weights on spring loaded arms. These arms push on a disk that moves the shaft coming out of the side of the engine block and varys the govenor speed.
whew - Henry.. I've never DONE one of these....
A shop manual on this engine prior to teardown would be a great investment.
