1968 40+ Compression

SeagullGuyUSA · Post by **SeagullGuyUSA** » Mon Dec 21, 2009 11:30 pm

Going to look at a 1968 40+ this week as I wasn't able to get out Sunday due to 20+ inches of snow in my location, and I am wondering what sort of compression should a good 40+ have to run well?

Hugz · Post by **Hugz** » Tue Dec 22, 2009 4:04 am

http://www.saving-old-seagulls.co.uk/fo ... sion#p5199

Checked service sheets 1 - 30. No mention of compression what-so-ever.

Regards Hugo.

SeagullGuyUSA · Post by **SeagullGuyUSA** » Tue Dec 22, 2009 2:55 pm

Thanks!

Hugz · Post by **Hugz** » Wed Dec 23, 2009 3:37 am

Having a bit of a chuckle: Clymer Publications. British Seagull Service.Repair Manual.

page 29 "Compression may be checked at sea by pulling the starter cord and noting that an adequate resistance is felt, or by removing sparkplug, placing a finger over the plug hole, and feeling for pressure."

SeagullGuyUSA · Post by **SeagullGuyUSA** » Thu Dec 24, 2009 10:46 pm

I got it today and it has 100 psi even.

phil · Post by **phil** » Sat Dec 26, 2009 12:35 pm

The 40 series will run fine with 80, 100 is good+, best I've seen is 117. I'm quite happy with 90 or more. The Century series a different story, they will run well with suprisingly low compression, 50 is very normal for them, best I've seen is 70+

rosbullterier · Post by **rosbullterier** » Sun Jan 24, 2010 3:08 am

See:

http://www.britishseagullparts.com/engi ... ession.htm

Saving Old Seagulls

1968 40+ Compression

1968 40+ Compression

Re: 1968 40+ Compression

Re: 1968 40+ Compression

Re: 1968 40+ Compression

Re: 1968 40+ Compression

Re: 1968 40+ Compression

Re: 1968 40+ Compression