Reply To: Can I apply heat to head bolt? Johnson RDE-17 1955 25 hp

[Bob Wight]

Frank and Fleetwin are right with regard to use of an acetylene torch if you have access to one and know how to use it without melting the block. I only have a propane torch and it’s easy to wring a bolt off if you’re not careful. I’ve twisted off a few in the past when trying to rush things. That’s why I take it slow and easy laying on the wrench after using just the propane and that’s why it took me a week to get the head bolts out of that ’72 Evinrude. As corroded as a lot of the bolts were on that motor, I’m still convinced propane will work with lots of penetrating oil but it sure takes a lot longer. Then there’s always the discussion about the best penetrating fluid.

Bob

1937 Champion D2C Deluxe Lite Twin
1954 Johnson CD-11
1955 Johnson QD-16
1957 Evinrude Fastwin 18
1957 Evinrude 3022
1958 Johnson QD-19
1958 Johnson FD-12
1959 Johnson QD-20
1982 Evinrude 25hp

“Every 20 minute job is only a broken bolt away from a 3-day project.”
"Every time you remove a broken or seized bolt an angel gets his wings."