1986 50 HP Yamaha Compression Question

[w2much]

Just wondering what the compression should be on this engine. Did a test and was a bit dissapointed that each cylinder only registered about 105. Just bought the motor and found that the oil injection was not operating properly Plastic thing which connects the rod which goes from the oil pump to the carbs was broken. Again , does any one know what the compression would have been on this motor when new?

 

[DJ]

Re: 1986 50 HP Yamaha Compression Question

105 is not that bad. The most IMPORTANT thing is that they are all equal.<br /><br />A decarb. may be in order. See link below.<br /><br /> http://forums.iboats.com/cgi-bin/ubb/ultimatebb.cgi?ubb=get_topic;f=36;t=000016

 

[w2much]

Re: 1986 50 HP Yamaha Compression Question

DJ, Thank You, Do you happen to know what the compression on a new (1986 Yamaha) was.<br />I appreciate your answersand........Thank You Again