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 HP .61 gold cup engine probs

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goldslinger
Midshipman
Midshipman
goldslinger

Posts : 95
Join date : 2016-05-29
Age : 58
Location : North Wales uk

HP .61 gold cup engine probs Empty
PostSubject: HP .61 gold cup engine probs   HP .61 gold cup engine probs EmptySat Jun 18, 2016 11:50 pm

help....
i have just got hp .61 gold cup engine and there are no blot holes to mount a muffler/exhaust
any one got any surgestions
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Damien
Captain (moderator)
Captain (moderator)
Damien

Posts : 3569
Join date : 2011-06-11
Age : 67
Location : Ballarat Vic. Aust.

HP .61 gold cup engine probs Empty
PostSubject: Re: HP .61 gold cup engine probs   HP .61 gold cup engine probs EmptySun Jun 19, 2016 1:23 am

A still spring around the engine block attached with screws to the muffler.
Admittedly I used this method to mount a tuned pipe on a smaller 2.5cc Super Tigre motor in the early 1970's with no blow by issues at all.
Or perhaps a hose clamp cut in two with ends screwed to the muffler would allow a firmer fit to a 60 sized motor. 

Damien.
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goldslinger
Midshipman
Midshipman
goldslinger

Posts : 95
Join date : 2016-05-29
Age : 58
Location : North Wales uk

HP .61 gold cup engine probs Empty
PostSubject: Re: HP .61 gold cup engine probs   HP .61 gold cup engine probs EmptySun Jun 19, 2016 8:39 am

thanks i hadn't thought of that
i have a muffler and a hose clamp just need a tap & die set to put bolts on the muffler
talking of putting threads in things has any one tried drilling the engine and putting threads in the head
or is that just too risky
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jarvo
Deck Hand
Deck Hand


Posts : 6
Join date : 2015-02-19

HP .61 gold cup engine probs Empty
PostSubject: Re: HP .61 gold cup engine probs   HP .61 gold cup engine probs EmptyThu May 24, 2018 7:33 am

Dont under any circumstances drill the motor, you will not get a good fit and the stress on the crankcase will distort or crack the casting

Mark
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