請教一些汽油機或摩托/割草發動機的問題

1.是因為看到harbor 13HP發動機的反饋：“Purchased this engine,took it home and mounted it in a atv I built. After filling engine with oil,I noticed a silver shine to the new oil. Since I build racing engines, I pulled the crank case bottom and found a bunch of metal fileings ,so took hole engine apart. the piston rings are a joke,and so was the cylinder hone,and vale job. just to see what I could do, I rehoned the cylinder, put honda pistons rings in it, and side polished the rod with arp rod bolts. to make a long story short and with the help of a high lifr cam, the engine now runs at 4500 rpm, and is making over 20 horse power. I have run the engine very hard with no problems for the last 114 hrs.” 該人改造及用本田活塞環後機器提高到20馬力！
上麵的honed the cylinder， side polished the rod with arp rod bolts，high lifr cam我不懂，請賜教。

2.我知道摩托/割草發動機多為2衝程單缸用混合油，但不知為啥這類機器毛病多？我的割草機是本田引擎，每次拉繩發動都要好幾次，風門調節在發動前沒幫助。似乎要化油器裏有層油霧後，不多不少，才能發動。正確的啟動和維護步驟?我忘了當初加油是否要混機油還是自動混的？清洗化油器的目的？

 

所有跟帖： 

• "honed the cylinder" 就是用磨石（三角形分布的三塊）旋轉打磨氣缸內壁。 -史迷- ♂ (1039 bytes) () 05/26/2015 postreply 13:44:37

• 史兄好！多謝答疑。多年前見過用刮刀磨活塞環，不大懂。不記得有磨缸，嘎斯51。 -chinomango- ♂ (0 bytes) () 05/26/2015 postreply 23:02:41

• 割草機現在都是四衝程的了。化油器裏麵有陳油就buhao -二吐為快- ♂ (87 bytes) () 05/26/2015 postreply 20:56:22

• 我的是舊的，問的也是舊的；4衝程的化油器在汽車上是啥沒見清理過？如何清理？ -chinomango- ♂ (0 bytes) () 05/26/2015 postreply 22:04:53

• 現在的汽車上木有化油器 -RoseBuilder- ♂ (0 bytes) () 05/27/2015 postreply 11:20:09

• 是，那四衝程汽油機5-20HP的還有嗎？感覺啟動問題多與化油器有關？ -chinomango- ♂ (0 bytes) () 05/27/2015 postreply 15:05:30