GT186 manifold - carb fouling engine mount
Posted: Mon Nov 18, 2019 1:20 am
I'm the final stages of an GT186 build and have discovered that the carb, a Mikuni TM24, won't fit as it fouls the engine mount. I found it strange because the GT Assembly Manual specifically mentions the TM24 and suggests 'ballpark' jetting. Searching the archives here also suggests that a number of others are also using this combo.
To complicate the issue further, there appears to be two versions of the 25mm Gran Turismo manifold. Mine is the later version that is upswept.
Since discovering the issue, I've also spoken an experienced builder and they confirmed that in the past they've cut the 25mm manifold and re-welded it at a more accommodating angle so the TM24 clears the mount. I'm willing to go down this route (and change it to a flange type mount while at it), but seeking advice from others running a TM24 on at GT186 first. Thanks!
To complicate the issue further, there appears to be two versions of the 25mm Gran Turismo manifold. Mine is the later version that is upswept.
Since discovering the issue, I've also spoken an experienced builder and they confirmed that in the past they've cut the 25mm manifold and re-welded it at a more accommodating angle so the TM24 clears the mount. I'm willing to go down this route (and change it to a flange type mount while at it), but seeking advice from others running a TM24 on at GT186 first. Thanks!